First of all, as I posted on the instagram story I posted with the photo above, there's no excuse for tennis strings not to have the brandname, stringname and gauge written on the strings, like Tru Pro do. Some other brands do it also, but not all of them. It's a small detail, but it's good marketing.
I switched from my Blade to the Youtek Speed that I hadn't played for a while and played 3 point-play matches (no serves) with Firewire Boost.
Very first impressions here:
+ High launch angle, almost impossible to hit the net
+ Not launchy on top-spin hitting (20mm beam width)
+ The grab on the ball is just insane! Very fun experience hitting with top-spin and slicing
- I can't tell the difference to the Mayami Machete. The Ghost Wire in the crosses, instead of Tour Hex, despite my Speed's thin beam, offers slightly more dwell-time than Tour Hex. Still, the overall dwell-time is short, better noticed on my flat 2-handed backhand, and the ball will get in n' out in a hurry.
I need to dial-in with my hitting zone with the Speed and hit lower and not as early as with the Blade, as yesterday I couldn't hit the ball quite well on the rise.
I will give it to a hitting partner of mine who plays with lots of top-spin to do a blind test next time (former ITF).
* only triangular string I've played before is the Mayami Machete (identical on my fingers) with Tour Hex in the crosses with the Diadem Elevate.