I'll comment as an owner of a Tarani model, with 420hc and FRN grips, and CRKT as pictured. I bought them back to back, the CRKT first.
Both are thick, so do appeal as a brawny knife. Both have saber grinds and don't "flow" through double corrugated cardboard as easily as a flat grind. The narrower point on the Buck worked better, as did the serrations; the finish on the CRKT is much more durable as a Ti coating than any other I've used.
Both grip well, the CRKT being more comfortable barehanded, the Buck using Strider's ergonomics much better when wearing gloves, which gives you a little more protection until you get used to the aggressive slotting on the back of the scales.
Lockup on the early Bucks was compromised by the thin liner. Most complaints seem to come from the low end 420hc bladed versions, few of the ATS34 knives are mentioned in this regard. CS Buck has responded that he is looking into it and believes it was focused on the early models; nonetheless, it's getting reviewed to make sure new production isn't affected. My Tarani, a warranty replacement, suffers from poor lockup, too. The CRKT does not, and none of my other CRKT's ever have, either.
My disappointment with the Tarani and some features of the CRKT led me to buy a Strider SnG. It's thinner, cuts better, locks up securely, and has never given me a moment's regret. Some say that the difference in price isn't justified, but the attention to functional use is very evident - no value engineered shortcuts in design or production - you truly do get what you pay for - extreme reliability.
Would I ever buy another Buck? Their traditional products have never really been my cup of tea, having tried a few, but I am looking at the 172 Mayo TNT. And if I found an ATS-34 version cheap I would only let limited cash flow prevent me from snatching it up, even if I don't need it.
As for the 420hc/FRN, not so much. The traditional 110 at Walmart is a much better buy, even if the same blade steel.