Bushnell ET / Sightron SIII / Vortex viper PST or Athlon Ares

This year I will buy a new airgun (most probably a texan) and consequently I need a new scope. I narrowed my choice to the following ref:
- Sightron SIII 6-24x50mm Side Focus FFP
- Bushnell Elite Tactical 6-24x50 G2DMR
- Vortex Tir Viper PST 6-24 x 50 FFP EBR1
- Athlon Optics Ares BTR 4.5-27x50 APLR3

Those scopes meet my technical requirements (FFP, MIL/MIL, tactical turrets)

A simple question remains to the guy who might have met one of thoses scopes: Which one has the best optics?

Please do not add other brands or ref. I live in Europe and some scopes are not available here. The list above is almost what I can get in the 1000€ price range.

Thanks in advance for your feedback.

-