So I've pulled the trigger and get 7000B for myself. Played with it yesterday so this opinion solely based on first session. Have it strung with no1 @26, same setup as my TC70. Same stringer which is me. Only difference is 7000b is still in factory grip. Hitting session, Clear and backhand with 7000b flown the shuttle longer. For drive I can feel it is slower than TC70. Normal smash no doubt 7000b won the power but occasionally I can deliver devastating smash with TC70 where my partner or opponent will shout 'holy crap'. With 7000b I haven't been able to deliver that thunderous smash where you get into proper time and technique but this is only happen few times. Control I still prefer TC70 where I can aim where I want to place the shuttle. As the time goes I can feel the head heaviness more pronounce on 7000b and get me tired. With TC70 I can play 2hours non stop without feeling tired and keep smashing. Also with TC70 my smashes are steeper. haven't been able to get the same steepness with 7000b perhaps because it's flex shaft. For now I would rate TC70 at 9/10 and 7000B is 8.5/10. If I can get the same control and steepness with 7000B no doubt it'd be my go to racket. Perhaps after I use my preferred grip setup.