I just compared R6 and FireBlade and it seems that Yamaha is 25% less powerful than Honada (117 and 160 hp) but for all that they both weight equal. So 25% is not a significant difference. I didn't mentioned R1 since as i heard it is VERY hard to ride for a newbie and as for FB i have opinions that it forgives a lot of driver errors. Also 600ccs acceleration is not enough for me after 300hp Mitsu
Maybe you guys can suggest some good 750cc??