They are a pretty good loader. Faster, bigger pump more lift and a longer wheel base are a plus (smoother ride) unless you have to do a lot of tight turning, then the short machines get the nod for less tire wear.The power difference will be quite large, the 743s are great, easy to work on, no computers to worry about. The S175 has a computer and all the things that go with it, but it does make for a lovely machine. Extra power, faster travel speed, more aux hydraulic flow.
Personally i find that the modern engines start easier than the V1702. I have to give my V1702 a good glow ti start, the V2203s seem to start very quickly and easily.
To further your question.They are a pretty good loader. Faster, bigger pump more lift and a longer wheel base are a plus (smoother ride) unless you have to do a lot of tight turning, then the short machines get the nod for less tire wear.
Heavier to haul (bigger truck and trailer maybe) and more weight on the same size tires won't help it float up on the soft ground though. Tracks can fix that one.
Just make sure all the guages work on there ar no error or warning lights. Make sure the auxilary hydraulics work and check all the things you would on any loader.
They are the 743 of this decade imo.
Ken