As far as AMD goes; Unless you've got the strange glitch that sometimes occurs with AMD Dual-Core Optimizer (Might be me being weird, I've not confirmed this): The two extra cores on the 1090t won't make any difference. That said; if you've already got the 1090t; There's no-point downgrading, just in case you do come across a game that can utilize the two extra cores.
Sold it as it was showing it's age and i needed the cash i got £110 from ebay for it so was not that bad as it is 2 years old it was a waist on me as i only game and internet
i used one previously...it was fine. But CPU intensive games really like OC'd 2500's at least There is a difference to the feel.