While I didn't get to handle the Gen I and Gen II side by side, I've shot both pretty recently. I'm very happy I went with a Gen II for my latest scope (in MOA). Like the poster above said, the Gen II features make enough of a difference to make the bump, especially the turrets. I wish I had them side by side to tell the difference in glass clarity/brightness, but have not had a chance to test that yet. Reviews from others seem to indicate the Gen II is noticeably better. Having said that, the Gen I can be hard to pass up for the price you can now find them used.