Titanfall should have no problem selling double of destiny on xbone. 360 should probably be pretty even between the two. I think pc will favor destiny since mmos are pretty popular there. Obviously destiny will sell better on ps4 and ps3. Heck I'll give some numbers. First is tf, second is d.
Xbone: 3 million, 1 million
360: 4, 3
PC: 0.3, 0.4
PS3: 0, 2
PS4: 0, 4
7.3 vs 10.4