Fit and finish is night-and-day. I've got (well, it's going, but still in my possession) a RAT-7. Handle fit is OK. It's production. I understand that. The fact that it's cut so that none of hte linen is available for "grip" except on the corners is a bad design feature.
The RAT-3 would be comparable to a Howlin Rat. Original HR price is probably comparable, but unavailable at this point. I'd rather have the Respirene-C vs. Micarta. I dislike both b/c a large choil in that size knife gets in the way for me.
I have no factual basis, but I also worry about Ontario's work with D-2. I'd like somewhere for them to tell me they spent a pile of time heat-treating it correctly. If it's just plain old D-2, it CAN be brittle. PErhaps not on anything I'd do to it, but I can't help thinking about it. When working in D-2, I'd like a known heat-treat like Busse/SR or Dozier. Heck, in ANY steel, I'd pay extra for a decent heat-treat.
This is not to say that RAT-knives are junk. They aren't. Good products. Unfortunately, I have a screw loose that requires me to seek out hte absolute best of anything I buy.