The majority of my wood here is so twisted and knotty that a 25 ton splitter has trouble getting it split, but it manages. The few pines I cut I can practically karate-chop and enjoy using a splitting maul on the bigger rounds or an axe on the smaller ones.
The tw3 appears to claim 14.5 tons splitting power and it expects 22gpm. IDK what your tractor is but the cycle time is going to probably be 2x as expected because of the gpm, and I hope your wood isn't like my oak because you won't be splitting anything bigger than a 10" round with that tonnage.
I'm a proponent of a self powered splitter, because for the money they seem much more capable (quicker and stronger). You'd think the opposite since you don't have to provide an engine and pump on the 3ph version, nor wheels... yet the 3ph versions seem much more expensive. Maybe they're built a lot stronger? Not sure why, given that they're not capable of processing the same.
Also a self powered unit lets you grab wood or move totes without moving the splitter, which may be an advantage again.
I bought my 25-ton unit rather used on CL together with an almost new Echo CS-590 for $600. I was going to pick up just the splitter for $600 (I'd not seen any used ones on the market within 100mi under $1k in a year's watching) but it turned out I'd misread the ad and it was a two-fer deal