The 1090t is a six core CPU whil the 965BE is a quad core.

It really depends on what you are doing though. In gaming, a 6 core CPU will be pretty useless but in heavily threaded apps like rendering and such it will beat the 965 easily.

Look here for a comparison of all the programs THG used of the 965 vs the 1090t:

http://www.tomshardware.com/charts/desktop-cpu-charts-2010/compare,2407.html?prod%5B4437%5D=on&prod%5B4440%5D=on

The one in the left column is a 1090t the right is a 965BE (not sure why it shows nothing but I selected a 965BE).

Unless you need the extra two cores of the 1090t, go for the 965BE.