The only reason a 201T is intended for professional use is because Stihl designed it to be used by tree climbing professionals. It can be used on the ground, but there are more reasonable saws for that type of use.
It also is one of the weakest, most gutless saws I think I have ever seen. I have a pole saw that will out cut a 201T, hands down. That being said, the 201T would probably be your least favorite saw of the bunch in terms of power and ergonomics if you used them back to back.
But hey, it has Stihl wrote on the side of it, so it will be the better of the bunch according some folks around here, in spite of the fact you will probably never climb with it, which was what it was designed to do.
As far as small saws go, the Echo 370 would probably suit you better than the 201T. The CS370 has a common as dirt bar/chain combo compared to the 201T's 043 gauge set up, more power than the 201T, and is capable of taking on bigger limbs and small trees that you would be limited to with the 201T.