Hi ponygirl...
Let me offer a few comments and then one or two followup questions.
First, the 2210 and 4100 likely could perform the chores that you've delineated. My preference is to always go for the bigger, higher HP tractor if your budget permits. I say this because you never know what chores and jobs you may tackle down the road. Your dealer is correct. You want a tractor that meets your needs now and in the immediate future. One mistake some of us make is buying small to try to save money, realizing later that the tractor is too small and then finding the need to upgrade. I've been a member of the TBN community for over a year now, have read countless threads, and the conclusion I've reached is this: Buy a tractor that's within your budget but also seriously explore how you can increase that budget to buy the next bigger tractor. This isn't a contradiction. I've experienced instances, and I think other TBNers have cited likewise, when I had jobs to do when I wish I had that higher HP tractor or the tractor that had just that extra oomph of torque.
If you're thinking of moving dirt and then manure, here again, think higher HP and a FEL that has greater lifting capacity. Also, think of installing a toothbar on the FEL to assist in digging at those dirt and manure piles. This is not like moving the light snow us northerners have. Also, I would go with a tractor with the R-1 bar tires, second choice would be industrial tread, and definitely not the turf tires. You live in Florida where you get plenty of rain....and mud. Those R-1s will serve you better than the other types when you're mowing those soggy fields and digging around in the dirt piles.
Now for the questions.....
I don't recall...but, do you have an upper limit that you want to spend? Are you flexible here? If so, think on the 4x10 series tractor. I believe these are 'made a bit tougher' and while I don't have the specs in front of me, I think you have higher engine and PTO HP as well as higher engine torque. If you go to John Deere's website, you should be able to find all the specs on both the 2210 and the 4100 (now 4115 I think). If not at JD's website, a good dealer should be able to provide this information. Also, if you haven't done so already, review the numerous threads on the 2210 and 4100 tractors in this JD buying/pricing forum. It'll take some time reading through all the threads and posts, but there's a lot of good experiential information others have posted that you can get some gleaning from and help in the decision you need to make. /forums/images/graemlins/wink.gif
Best of luck to you in your shopping...let us know how you make out.
.....Bob