It's both.
The PST2 has the old RZR turret system. It also has better glass according to Vortex.
The strike eagle has less glass quality but it has the new locking turret and zero stop. The zero stop is just a shim that snaps in place after you have zeroed your rifle.
My eyes much prefer the PST2. I can see more clearly at further distances. Both tend to suffer in heavy shadows. The internet trend is to say the Strike Eagle has better glass. I will say I kind of like the locking turrets on the SE if you need that feature.