"OC's more' is a vague statement....; wondering wether the 1100T has more 'headroom' is likely the issue....
Both CPUs could top out at exactly 3.9 GHz, and it would still be true (but misleading to some) to say the 1090T 'OC's more', simply beause it started at a lower core clock. If both, however, have the same 3.8-4.0 GHz limit, most would choose the CPU that costs less....
THG's review of the 980BE showed it had no more headroom than any of it's predecessors, so hopes of 'better /more matured silicon process' quickly faded.