Both brands are excellant, though I agree, the 3130 is a closer match to the 4310. You certainly would not go wrong with either, with the right dealer...
As to price, you can shop for a good deal on what you want. and I believe a bad deal to get a comparison. (I am NOT suggesting that you are doing this...) So, to be fair, if you want apples to apples quotes, go after a 4310 or 4410 and get your best quote, to know how they stack up.
Or don't! As the ever levelheaded _RaTmeister_ put it; you can argue advantages for either, and be thrilled with the one you get!
Have fun!