I didn't touch Butterfly rubbers for 15 years, but finally I tried Zyre 03 today for the first time for 1 hour, mostly multiball and 3 sets at the end. Obviously, it is too early to make final conclusions, but I can't wait 3-6 month before writing about it here
Setup: Viscaria SALC, Zyre 03 on FH, previous rubber Tibhar Hybrid K3 Pro.
It must be a little bit lighter than k3 pro, maybe ~2grams, but didn't weight it, just was easier to engage wrist than usually.
Speed - I didn't feel it being extremely fast, maybe it needs some time to soften a little bit to get more speed. Somewhere close to K3 Pro when it is new, maybe a little bit faster, but maybe not. Definitely easier to get like 60-70% of max speed of it, but top end speed difference is not big. I believe that top end speed must be higher, just I cannot get it out of it maybe due to 2 weeks pause in trainings before trying this rubber, maybe due to not being a pro player.
Trajectory - Butterfly said that it is higher than dignics (don't remember which one), but it wasn't high for me, flatter and longer compared to K3 Pro, but again not much. And weird thing that when looping against backspin I always felt that ball must hit the net, but somehow it was getting over it and it was not once or twice, it was almost every time.
As everyone says looping is quite easy and especially counter looping is extremely easy. Noticeably more controllable than with K3 Pro. K3 Pro was very good in this aspect for me, but Zyre is even better. Could contact the ball earlier and it is easier to get more speed on counter loops than it was with K3 Pro, probably reusing opponents energy better. But attempts to produce less speed more spin kind of loops was worse than K3. Maybe just need some time to adjust.
Short game is good, it wasn't hard to leave the ball short, quite controllable, however read below regarding spin.
Spin and feel - in short - I don't know. I completely don't understand the feedback it provides. It feels like I play with a thick and hollow racket that doesn't produce spin at all. But sometimes my opponent made mistakes due to spin, and sound of ball contact with net and surrounds that were around the playing area almost always indicated that there is a good amount of spin (after loops). So I'm not sure whether serves or short pushes had spin or not, my opponent didn't kill me after those, so maybe there was some. I don't understand how can I make adjustments to my strokes to get better result (I need SpinSight

), I don't understand whether serve or short push has spin and I can be calm or it was bad attempt to produce underspin ball and I have to switch to panic mode and make a couple of steps away from the table and get ready to be killed, and then to make adjustment in the future. That's why I don't really understand how can I improve with it over time. Maybe I will get used to it.
As a conclusion, if I could buy a new K3 Pro every month, I would stick to it (obviously, I don't have to adjust to it). On the other hand if Zyre 03 keeps its properties for like 3+ month without significant change and being playable for at least 7-8 month, than I'll have switch to it just to have more stable rubber over time