the 1090 is faster period. the FX chips are overpriced, underperforming, power sucking failures. No BIOS update or windows update will change FX chips performance. You do need an am3+ socket for the FX, the 1090 can run in an am3 board. SOME am3 boards have the correct socket and are compatable with the fx chips, not all. But as has been said, the 1090t is the faster CPU, it wont overclock as high, but it will still be faster at lower clocks. http://www.guru3d.com/article/amd-fx-8150--8120-6100-and-4100-performance-review/4
read the reviews and see for yourself.