Yeah that’s the dilemma when choosing between sticking with the gravity pro and changing to a blade pro. Do you notice more power between the 2 rackets or control with one of the 2 rackets?
I feel like the power with the gravity is sometimes lacking but it’s feels like a good racket to play doubles with due to the solid volleys it offers but for singles I seem to miss hit backhands long or into the net which with the serve I struggle with this racket. Compared to a pt57a pro stock, the control, feel and manoeuvrability is amazing but offers no free power. A few people prefer the Wilson blade pro over the pt57a but since you can’t demo these types of rackets, it’s a buy and hope the racket fits your game and you gel with it hence why reviews for both the gravity pro and blade pro are important when buying the rackets.
When you asked the original question, I can't remeber whether you specified the Blade Pro (16x19 or 18x20)? I'm assuming 18x20, and therefore I have not weighed in, but I can comment on the 16x19 (and it will apply to the 18x20 as well). They don't sell the BP 18x20 in Australia, otherwise I would have bought that one as well.
The very brief version... for me it comes down to the balance of the racquet and personal preferences. When it was in stock form, I found it much harder to wield than when I modified it to be much more HL (even though then it was much heavier static weight). What follows is a more detailed explanation (read if interested).
With the Blade Pro the SW will be up there (as I'm sure you're aware). Therefore, it comes down to the balance you like to have when all is said and done. I bought the BP 16x19 and the UP 16x19. Played them both stock first and prefered the UP 16x19 because of the balance and feel. However, the BP had great power and a very good feel (just not as great as the UT/UP range)... the problem was the combination of the SW and balance (mine was 313SW unstrung). I therefore decided the make mine much more HL... I added most of the weight to the handle and butt cap (a very small amount to the head as well in order to increase the sweet spot). I ended up with 343g, 305mm balance, and 324SW (unstrung), BUT because the balance is 12 Pts HL unstrung, the racquet swings very easily and feels much more manueverable than when it was more HH (in stock form). The strung weight of my racquet is around 360g (depending on strings used).
I also modified my UT and UP racquets to about 353g static when strung (and I can't remember the balance or SW now - but more HL and higher SW as I added much more weight to the head than with the BP). The BP blew the UP 16x19 and UT 18x20s out of the water when it came to power and ease with which you can dominate your opponent. The UP/UT racquets were much more precise, had much better finesse, creativity, and feel (which is subjective). To contain the power and make it controllable, my BP is strung at 50 lbs with poly (currently using hybrid so 50M/54C - with the multi in the crosses). My UP and UTs are strung at 46M/43C, and the BP is still much more powerful.
I also have a GP, and it's strung weight is 360g and it's balance is 315mm strung, and even though I have never checked the SW, it will be 340+ (as I added weight to the hoop). Therefore, they are comparable in static weight and balance.
The BP is much more powerful, but still controlled. It can obliterate the ball, serves very well, and is a monster on return-of-serve. The GP is more precise, more controlled, lower powered, and has more margin for error and slightly larger sweet spot (due to the larger head size). With the BP (at least the 16x19) I tend to aim for slightly larger targets, and I tend to try to take control of the point (get on the attack). If I can do that, it makes it very hard for the opponent to win the point. With the GP, I have to try to construct the point a bit more. Both are great racquets, but the BP has more brutal power.
Like I said, the BP 18x20 is not available for purchase in Australia, so I can't comment on the specifics of that one when it comes to outright power and control. I suspect it would still be very powerful (maybe less so than the 16x19), and more controlled.
Hope that helps... and sorry about the long post.