Can't tell you about the Answer ASX's. I tried to find reviews/opinions about them a few months ago & couldn't. It just doesn't seem like many people buy them.
But if you're considering the O'Neal's, they're a great boot. I took Mully's advise after trying the AXO RC5's (uncomfortable & super stiff) & basically everything he says about them is spot-on:
http://dirtrider.net/drn_tested/boots/oneal_hardware.html
They replaced my cheapo Fox Trackers, & I absolutely love them. Last weekend I went back to my Fox's so that my friend could try the Hardwears, & he couldn't believe how comfortable they were.
If you do try the Answers, please give us a review!