In my opinion, PTO hp is the biggest difference between the two. If you plan on using something like a 5' rotary cutter, the LX3310 may be the better choice. Don't know if there would be much difference with a post hole digger.
Well on the plus side, at least it connects every time unlike the John Deere auto connect setups that are often finicky and require spot on setup.Well "hard" is subjective . But you're right, it's not a real big deal. It's far easier than my old John Deere Garden Tractors (140, 318, 332, etc) that's for sure.
But it's not as fast/easy as removing the loader, where I don't even have to get off the seat of the tractor.
I guess my point was I wouldn't want to put on/take off the mower deck every time I had to mow, whereas I do take off/put back on the loader every time I mow.
Get a chipper for your new tractor and mulch the ground around the trees with it. Put 6" deep and add as necessary as it settles and breaks down over the years. Makes for zero tillage, water retention, soil improvement, weed control, and more. Tilling every year just invites compaction, moisture loss, and helps weeds to flourish. AND is way more costly to do! Get a wood chipper. Mulch your trees with chips. I promise you won't regret it. Unless of course there's no trees around to harvest, but it doesn't sound like you're in a desert there...I might use it continually between the trees and for a garden area so I would likely keep it. I just have someone in my ear concerned I need to be over 40HP because of how tough the ground will be. I thought the LX would be lots.