I have access to both saws. I have a v1 462 and we have a new 400 at work. Both are stock. As of now, I still like my 462 better. I keep a 20” on mine for firewood, but used a 24” on a week long mission trip in LA doing cleanup work after a hurricane. It never let me down cutting some big live oaks. Did I want a bigger saw for some of them, yes. Did it get the job done without any issues, yes. I don’t see me picking up a 400 for myself, it just hasn’t impressed me much yet. I currently have a 261, 362, 461, and 395 all ported by Randy. He has my 500i at his place now. I also have stock 241, 440, 462 and 661. I’m not sure the differences in power between V1 and V2 462, but I would lean that way if money wasn’t an issue. I would do it for the metal handle if nothing else, lol. I will probably sell my 462 and 362 to get a V2 462 and have it ported by Randy in the near future. I’m not wasting money on the V1 to have it come apart on me!