Personally, I thought the G10 version was the best. I especially like the fact that it is assembled with screws, instead of rivets. Not big sellers, though. I guess the pricing was a bit too much when compared to the 181's. I actually sold one at the Del Mar gunshow today, though.
I argued, and lost, the battle to make the ATS-34 models with plain blades a long time ago. Dunno why the marketing dept. was so hard-headed about that. Maybe if they had made them, the knives would have sold better and would still be around.
Too many tacticals?!?!?!?!?....nah.....never!
BTW, I don't call 'em "tacticals", they're "Sport Utility Knives".
I still have a few of the G10 and Carbon Fiber models left. The CF is sweet. I may have to keep one of each for my "collection".