Well, it is honestly hard to tell from my side.
I played three-ish years with 301, then year and a half with PG7 and recently bought Fang Bo BX2. Since I tried blade only few times with same rubbers as on a main blade, the insight cannot be that deep. However, comparing B2X to PG7 is like night and day. I would stay with Allwood since the feel is incomparable. I didn´t get any wow effect from B2X as I get from PG7 after getting in just for fun while still playing with 301. (History is Korbel -> Yinhe -> PG7 (broken) -> 301 1st-> 301 2nd -> PG7)
Vs 301, I got a feeling that it has less feel for the ball. I could feel the impact of the ball more with 301 than with B2X. Like innercarbon blade should be between wood and carbon, B2X feels like it is between Carbon and Innercarbon. Somehow metalic feel for the ball, yet not so fast. Especially on backhand it can be felt.
In my opinion:
Speedwise: B2X > 301 > PG7
Feel wise: PG7 > 301 > B2X
Control: PG7 > 301 > B2X