World Beyblade Organization by Fighting Spirits Inc.

What I mean is, how do the Speed and Heavy Beylaunchers, regular Beylaunchers and Beylauncher Ls, the Beylauncher LR and Dual Threat Launcher, the Master Kit Beylauncher, and the Long Beylaunchers in the Achilles and Fafnir sets differ?
Do some Beylaunchers have longer/shorter strings? Are some more prone to skipping teeth? Do they wear down quickly? Are some better for launching heavier/lighter Beyblades? How do they compare to Light and Sword Launchers?

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