I bought one of the 2 you're looking at. Honestly, I bought my dealer, not my brand. First impressions were, "this is my guy", and after a year, I haven't had any reason to rethink that. Take a very close look at each dealer, how they operate, how they treat you, service, etc.
I'm happy with mine. It's slightly different than your candidate, as mine has a cab. Don't underestimate the value of the heavier weight. My cab unit, with FEL (and bucket), rear box blade (72") and filled rear tires weighs 7100 lbs. That's weighed on a CAT scale, not a wild guess or estimate. I can do most of my work in 2nd gear on the HST, and only seldom use 1st if I'm pushing a big pile of dirt or gravel. The diff lock comes in handy when I'm mowing my road ditches, as I have one area I have to climb that's very steep. I have a 72" brush hog, and I've never hit anything heavy enough to bog the engine down, it runs over brush and waist high grass/weeds as fast as I'm comfortable in running it (over semi-rough ground, pastures, etc). The only time I ever use 3rd gear is on the few occasions that I "road" the tractor.
Edited to add--
I've had no problems picking up and moving full size round bales with my tractor. I put a bale spike on the SSQA, in place of the bucket, and just stab the bale, pick it up and go. No problems dropping it in the round feeder either. This is with my box blade on the back for ballast. But my rears are filled with Rim Guard.
If you have any specific questions, feel free to PM me.