This month from my friends at Wilson...
Sabrina V, as with The WATT/Puppy utilizes the same Wilson Audio QuadraMag Midrange as is in XVX, Alexx V, Alexia V, and Sasha V, the same Wilson Audio Convergent Synergy Carbon tweeter found in Alexx V, Alexia V, and Sasha V, and the same 8" woofer found in Alexia V(upper) and Sasha V (Yvette used a 10"). The capacitors are the most advanced WilsonAudio Cap-X Coppers we have designed/manufactured to date. Sabrina V debuts H material as its baffle, the most correctly damped, monotonic material we have yet developed. It will replace S material going forward. Much has happened in the 9 years since Yvette's debut.
Bottom line: In all but the lowest bass and in the ability to scale, Sabrina V should be a substantial step up from Yvette. It's easier to drive, more open, more resolving. That said The WATT/Puppy is suitable in the same systems and rooms that Sabrina V is. So if you wanted to maintain the scale of the Yvette while adding the precision adjustable time alignment, the WATT/Puppy would be the choice.
Hope this helps