Could be the 6.5x erector design that might have something to do with image quality or light emission. Should not be much though. I opted for 2.5-16x50 instead of 4.5-30x50. I have a 6-24x50 on my long range tactical rifle and for hunting purpose the 6x is a bit too much. 2.5x should come in handy and 16x is quite enough for me for a hunting rig.
Here's a review I found before I placed an order on mine:
http://www.opticstalk.com/bushnell-elite-6500-2516x42-with-mildot-reticle_topic15017.html
Here's a review I found before I placed an order on mine:
http://www.opticstalk.com/bushnell-elite-6500-2516x42-with-mildot-reticle_topic15017.html