I'd bet $20 they're almost identical in color...the picture on the right is blown out from the flash. The one on the left makes the colors look deeper/darker because the white background is making the camera compensate.

I think either one is nice...and I assume both are proven, so I'd probably base my decision on who's selling them and how well I trust them or their animals.

About half of all adult snakes I've bought have come with some sort of baggage...be it mites, funny feeding preferences, etc. I bought a male pastel for $800 one time and it turned out to have a malformed hemipene and couldn't or wouldn't even breed...unfortunately, I probed the snake when I got it, so I had no idea until he was an adult. Wasted four female adults trying him that year, so I ended up selling him as a $100 pet. Talk about a pisser.