At the end of my training session, which as mentioned before was focused on the BH down the line shot and added some return board play, I gave the Viscaria another try. The T05 side still felt kinda meh. It's pretty fast, but doesn't hold the ball well. The D09c side felt really good, and against the return board still felt blazing fast compared to the W968.
What really impressed me was the BH down the line shot. That shot involves a smaller BH motion unless you're farther away from the table and have the time to wind up, so it's really, really hard to generate good quality with the W968. With the Viscaria, however, it was so easy it felt like a cheat code! It's not just that it was so easy to generate good pace, the placement is also super spot on. Idk why, but it just goes where I'm pointing. I remember Fang Bo saying that he recommends amateurs to use the Viscaria rather than the W968, not just because it's tough for amateurs to generate the power to use it, but the slower incoming shots don't help either.
Oh the FH side, I do need to brush a bit more, the trajectory is a bit flatter when hit hard. In counter-looping close to the table against very spinny but relatively slow opening loops this actually works in my favor as I can get good contact without overshooting the table. Sometimes against those types of balls if you don't brush just right with the W968 it'll react very strongly to the incoming spin and take the ball too long.
I've just glued a sheet of D09c to the Viscaria's BH side, I'll give it a try at the club tomorrow. I think I'm gonna glue D09c and D05 to my TB ALC to try out the D05 as well. Since the D09c vs. T05 comparison was very similar on the Viscaria as on the W968, I do think it'll be similar and I'll prefer the D09c, but it'll be interesting to try.