The Arken looks better on paper. And the reviews on the glass are looking good so far. The Arken is a very different scope compared to the Leupold. The Arken has 108MOA adjustment vs 76 on the Leupold. 50mm objective vs. 40mm Arken is First focal plane. Leupold is Second focal plane. Arken uses an illuminated reticle, Leupold does not. Arken has a zero stop and I don’t believe the Leupold has one.
I’ve had two Arkens. SH4 and EP4. They are well built for the money. Glass is on par for its price range. Nothing to write home about but nothing in this price range is. The glass on my Athlon Ares BTR is crisper and better in low light. But it’s also $300 more.Though I believe Cameraland has them on sale for around $600.