I’m pretty sure the idea of "low height Defense combos" have been looked into before, but I don't think that extensive tests were ever posted.
Anyway, here are some tests I’ve done to show how 85 height Defense combos perform compared to their 145 height variation (GB145):
Equipment:
MFB Attack Type BeyStadium
Beylauncher/BeyLauncher L
All Beys launched at 100% power
MF-H Earth Aquario 85/GB145CS always launched first
CS:
MF-H Earth Aquario 85CS vs MF Lightning L Drago 90RF
MF-H Earth Aquario 85CS: 13 win (13 OS)
MF Lightning L Drago CH120RF: 7 win (7 KO)
MF-H Earth Aquario 85CS win percentage: 65%
MF-H Earth Aquario GB145CS vs MF Lightning L Drago 90RF
MF-H Earth Aquario GB145CS: 6 win (6 OS)
MF Lightning L Drago CH120RF: 14 win (14 KO)
MF-H Earth Aquario GB145CS win percentage: 30%
MF-H Earth Aquario GB145CS lost most of the battles due to it losing balance, causing the rubber on CS to act like a wheel. This often causes the Bey to 'roll' out of the Stadium when it gets hit.
RSF:
MF-H Earth Aquario 85RSF vs MF Lightning L Drago 90RF
MF-H Earth Aquario 85RSF: 11 win (9 OS, 2 KO)
MF Lightning L Drago CH120RF: 8 win (8 KO)
Draw: 1 (1 KO)
MF-H Earth Aquario 85RSF win percentage: 55%
MF-H Earth Aquario GB145RSF vs MF Lightning L Drago 90RF
MF-H Earth Aquario GB145RSF: 8 win (8 OS)
MF Lightning L Drago CH120RF: 12 win (12 KO)
MF-H Earth Aquario GB145RSF win percentage: 40%
Test by Ray Joker:
MF-H Earth Bull 100RSF vs. MF Lightning L Drago 90R2F
MF-H Earth Bull 100RSF: 3 wins (3 OS)
MF Lightning L Drago 90R2F: 7 wins (7 KO)
Bull win rate: 30%
CS:
Tests by Fire Eternal:
MF-H Earth Bull 85CS vs. Lightning L-Drago 100RF
MF-H Earth Bull 85CS: 3 wins (3 OS)
Lightning L-Drago 100RF: 5 wins (5 OS)
2 Draws
Earth Bull win rate: 30%
MF-H Earth Bull 100CS vs. Lightning L-Drago 100RF
MF-H Earth Bull 100CS: 4 wins (1 KO, 3 OS)
Lightning L-Drago 100RF: 6 wins (6 KOs)
Earth Bull win rate: 40%
MF-H Earth Bull C145CS vs. Lightning L-Drago 100RF
MF-H Earth Bull C145CS: 2 wins (1 KO, 1 OS)
Lightning L-Drago 100RF: 8 wins (8 KOs)
Earth Bull win rate: 20%
CS:
MF-H Earth Aquario 85CS vs MF Lightning L Drago CH120RF
MF-H Earth Aquario 85CS: 11 win (10 OS)
MF Lightning L Drago CH120RF: 9 win (9 KO)
MF-H Earth Aquario 85CS win percentage: 55%
MF-H Earth Aquario GB145CS vs MF Lightning L Drago CH120RF
MF-H Earth Aquario GB145CS: 8 win (8 OS)
MF Lightning L Drago CH120RF: 12 win (12 KO)
MF-H Earth Aquario GB145CS win percentage: 40%
Test by Fire Eternal:
MF-H Earth Bull 100CS vs. Lightning L-Drago CH120RF
MF-H Earth Bull 100CS: 2 wins (2 KOs)
Lightning L-Drago CH120RF: 8 wins (8 KOs)
Earth Bull win rate: 20%
RSF:
MF-H Earth Aquario 85RSF vs MF Lightning L Drago CH120RF
MF-H Earth Aquario 85RSF: 14 win (12 OS, 2 KO)
MF Lightning L Drago CH120RF: 5 win (5 KO)
Draw: 1 (1 KO)
MF-H Earth Aquario 85RSF win percentage: 60%
MF-H Earth Aquario GB145RSF vs MF Lightning L Drago CH120RF
MF-H Earth Aquario GB145RSF: 7 win (7 OS)
MF Lightning L Drago CH120RF: 13 win (13 KO)
MF-H Earth Aquario GB145RSF win percentage: 35%
AD145, which weighs the same as CH120, was used in place of CH120 since it tends to shake/wobble around at 145 Height Mode.
CS:
MF-H Earth Aquario 85CS vs MF Lightning L Drago AD145RF
MF-H Earth Aquario 85CS: 13 win (10 OS, 3 KO)
MF Lightning L Drago AD145RF: 7 win (7 KO)
MF-H Earth Aquario 85CS win percentage: 65%
MF-H Earth Aquario GB145CS vs MF Lightning L Drago AD145RF
MF-H Earth Aquario GB145CS: 12 win (11 OS, 1 KO)
MF Lightning L Drago AD145RF: 8 win (8 KO)
MF-H Earth Aquario GB145CS win percentage: 60%
RSF:
MF-H Earth Aquario 85RSF vs MF Lightning L Drago AD145RF
MF-H Earth Aquario 85RSF: 13 win (10 OS, 3 KO)
MF Lightning L Drago CH120RF: 7 win (7 KO)
MF-H Earth Aquario 85RSF win percentage: 65%
MF-H Earth Aquario GB145RSF vs MF Lightning L Drago AD145RF
MF-H Earth Aquario GB145RSF: 13 win (13 OS)
MF Lightning L Drago CH120RF: 7 win (7 KO)
MF-H Earth Aquario GB145RSF win percentage: 65%
MF-H Earth Aquario 85CS vs MF Gravity Perseus 90RF
MF-H Earth Aquario 85CS: 6 win (6 OS)
MF Gravity Perseus 90RF: 14 win (14 KO)
MF-H Earth Aquario 85CS win percentage: 30%
MF-H Earth Aquario GB145CS vs MF Gravity Perseus 90RF
MF-H Earth Aquario GB145CS: 10 win (10 OS)
MF Gravity Perseus 90RF: 10 win (10 KO)
MF-H Earth Aquario GB145CS win percentage: 50%
MF-H Earth Aquario 85CS vs MF Gravity Perseus D125RF
MF-H Earth Aquario 85CS: 10 win (9 OS, 1 KO)
MF Gravity Perseus D125RF: 10 win (10 KO)
MF-H Earth Aquario 85CS win percentage: 50%
MF-H Earth Aquario GB145CS vs MF Gravity Perseus D125RF
MF-H Earth Aquario GB145CS: 7 win (7 OS)
MF Gravity Perseus D125RF: 13 win (13 KO)
MF-H Earth Aquario GB145CS win percentage: 35%
MF-H Earth Aquario 85CS vs MF Gravity Perseus R145RF
MF-H Earth Aquario 85CS: 9 win (9 OS)
MF Gravity Perseus R145RF: 11 win (11 KO)
MF-H Earth Aquario 85CS win percentage: 45%
MF-H Earth Aquario GB145CS vs MF Gravity Perseus R145RF
MF-H Earth Aquario GB145CS: 5 win (5 OS)
MF Gravity Perseus R145RF: 15 win (15 KO)
MF-H Earth Aquario GB145CS win percentage: 25%
WB:
Tests done by Dan:
MF-H Earth Bull 85WB vs. Vulcan Horuseus 90RF
MF-H Earth Bull 85WB win rate: 2/10
Vulcan Horuseus 90RF win rate: 8/10
Earth Bull 85 win percent: 20%
MF-H Earth Bull C145WB vs. Vulcan Horuseus 90RF
MF-H Earth Bull C145WB win rate: 1/10
Vulca Horuseus 90RF win rate: 9/10
C145 win rate: 10%
85 win rate: 20%
RSF:
Tests done by Ray Joker:
MF-H Earth Bull 100RSF vs. MF Vulcan Horuseus 85R2F
MF-H Earth Bull 100RSF: 4 wins (4 OS)
MF Vulcan Horuseus 85R2F: 6 wins (6 KO)
Bull Win Rate: 40%
MF-H Earth Bull GB145RSF vs. MF Vulcan Horuseus 85R2F
MF-H Earth Bull GB145RSF: 3 wins (2 OS, 1 KO)
MF Vulcan Horuseus 85R2F: 7 wins (7 KO)
Bull Win Rate: 30%
MF-H Earth Bull 85RSF vs. MF Vulcan Horuseus 85R2F
MF-H Earth Bull 85RSF: 5 wins (4 OS, 1 KO)
MF Vulcan Horuseus 85R2F: 5 wins (5 KO)
Bull win rate: 50%
Tests done by Dan:
MF-H Earth Bull 85WB vs. Meteo LDrago CH120LRF
MF-H Earth Bull 85WB win rate: 3/10
Meteo LDrago CH120LRF win rate: 7/10
Earth Bull 85 win percent: 30%
MF-H Earth Bull C145WB vs. Meteo LDrago CH120LRF
MF-H Earth Bull C145WB win rate: 2/10
Meteo LDrago CH120LRF win rate: 8/10
C145 win rate: 20%
85 win rate: 30%
It's also probably worth mentioning that, although most of you probably figured this out already, MF-H Earth Bull 85CS achieved a 100% win rate over MF-H Earth Bull GB145CS.
It would be great if some of you can post some tests of Low Height Defense Combos together with some tests of 145 height ones as a comparison.
(I'm especially eager to see how Vulcan will do against MF-H Earth Bull/Aquario 85/90 CS/RS/RSF, since I have a feeling that it wouldn't achieve as high a win rate as it does with 145 height Defense combos.)