If the trend from HMS and Plastic-era continued, the rubber used for Hasbro's RF is apparently harder from that of Takara and SonoKong's. Has anyone done comparative testing on this? I don't have access to the TT and SK versions at the moment, but it seems like Hasbro's was fairly hard.
RF variations?
It seems the same, actually. There's a thread already discussing the mold differences/whatnot between Hasbro and TT.