what's better gen 1 razor or gen 2
Uh, your question is pretty vague. Are you talking about rifle scopes or spotting scopes, and low or higher-end? In any case, it isn't surprising that the Gen 2 optical clarity is better than Gen 1 (as it should be). There's a noticible difference between the Gen 1 Razor rifle and spotting scopes, but the Gen 2 products still aren't up to the level of Zeiss, Swarovski, Schmidt Bender, or Premier. But to be fair, Vortex pricing is a hell of a lot less than any of the above-mentioned companies' products.
Early-on, Vortex's claim to fame was their price-to-performance ratio. This still holds true. Vortex's higher-end offerings offer excellent performance and bullet-proof warranties at substantially less cost than it's European competition. I wouldn't kick a Gen 2 out-of-bed but I still prefer PMII scopes', and Zeiss, Swarovski, and Optolyth spotters over Gen 2 Razor riflescopes and spotters.
However, no matter the experiences of myself and others, the most important thing here is what YOU can afford and/or are willing to pay. Some of the best research you can do is to talk to people at the range who have some of the scopes in question, and politely ask if you can look through their scope(s). Unless they look busy and/or are packing-up, most people are happy to answer questions and let you look through their optics. This is especially useful if it's overcast, getting dark, or raining because even the crappiest optics perform OK in bright conditions.
If shooters at your range don't have the optics you're interested in for comparison, the only thing to do is call around and see if any stores in your area carry what you're interested-in. Just keep-in-mind that everything looks good in a store. If there aren't any stores that carry the scope(s) you're interested-in, I'm afraid you're out-of-luck.
Keith