To me, the biggest difference for the most part is the difference in the materials and how well they do in heat. Living in MN, this may not be as huge to you, but in Texas, I will pay whatever I have to to get the wickiest, breathiest, lightest, highest SPFiest jerseys (and shorts) I can get.
My personal favorite best hot weather jerseys are those made by YMX, which TE sells. Love their designs, but more importantly, I love their Madcool fabric. I always love it if I can score one on sale.