Question on tires

I have a set of STI Rocktane HD’s on my 2014 base model 570. Nice tired, but it is 8-ply and they are heavy. I got them for free from STI because the Black Diamonds that I had would not hold air…

Anyway, even with the QSC clutch, you can tell that these tires weigh a ton. They are a LOT heavier than stock, I would say almost 50% heavier. So I was looking to pick up a set of the ITP Mudlite XL’s that my friend with the same quad loves…

I have ITP steel wheels with a 2" offset per side for a 4" wider stance.

My question is, can I put 25x10x12 tires on front and back? Are there any drawbacks to having the same size tire all around?