Hi,
I happen to have a Viscaria and have used T05FX as backend. Cloae to the table felt amazing, however when I play mid distance, lack power and grip. Kreanga would kill me if I say this.
So in my search for more power, I went to D05. Is an absolute beast if you have the proper technique to use it. You gotta accelerate fast, explosive to benefit of the speed and spin it provides. Hard to open up topspin game, in my case. Blocking has been amazing and the ball in the case of counterspin, was landing in 70% of the time right ar the edge of the table, without putting much effort into it. For me has not been the right rubber. Passing from 32 deg hardness to a 40 deg hardness (as advertised by butterfly) has been an overstep and I cannot get the feeling of the ball in the blade.
So I have passed to T19. Compared to D05, is so easy to manage, open up the game easy, blocking is fantastic. You gotta adjust the blade to the right angle as the trajectory of the ball is more linear, not like T05. Counter topspin is great in the mid distance, exactly what I was looking for, as it does not lack the power. It will feel a bit slower than T05, but don’t let yourself fooled. If you pit the right amount of power, it goes wild. It has great control, more than T05, which I play on the forehand. Flicks, i cannot say how amazed I am. Because the ball stay longer in the rubber, it grips better with the feel of control.
So in my case T19 is the right rubber to use as intermediate until I develop my technique more and have the stability and snap to use D05.
I would recomend T19 for advanced to elite players and D05 for elite to PRO
Hope this helps!