I know Elliott well, but not Sam.
Elliott is a very sweet and romantic partner who will spend a lot of time outside or going to the beach. If you have kids, his dialogue focuses around their education and well being, which is also kind of sweet.
Towards your farmer, he says (and does) a lot of sweet things, such as compliment you and tell you your worth to him, as well as gift you things like coffee and fish stew. (New Years you get a special gift too.) There is also quite a lot of romantic dialogue, which is kind of cool because he talks in an almost shakespearean-like manner. He also focuses a lot on his books and writing, especially poetry.
He doesn't go into his cabin anymore once he moves in, instead he just hangs out at the beach. It's not too frequently, maybe once a week or so? Other wise he seems like a really decent family guy. Just like any other spouse (I believe) he helps out around the farm, watering and fixing things.
The other thing I like about him is that his addition to your farmhouse can easily work with your decor if you like and looks pretty nice. Of course this is just my opinion, but overall Elliott is a pretty good choice.