Collins was more impressive in college...because (IMO) Giles rushed back from injury. However, I would submit, Giles has skills/abilities that Collins doesn't come close to, even if Collins has done a bit more in limited fashion.
Career FG% - Giles 52%, Collins 44%
3-pt% - Giles (doesn't shoot them), Collins .324
Points/Per 36 - Giles 17.5, Collins 11.8
Reb/Per36 - Giles 9.9, Collins 8.2
Asst/Per 36 - Giles 3.5, Collins 1.9
Stls/Per 36 - Giles 1.3, Collins 0.6
Blks/Per 36 - Giles 1.0, Collins 1.4
ORtg/DRtg - Giles 105/109, Collins 105/109
WinSh/48 - Giles .081, Collins .069
BPM - Giles -2.2, Collins -2.6
VORP - Giles -0.1, Collins -0.4
TS% - Giles .548, Collins .528
Rebound/Asst/Steal/Blk% - All in favor of Giles
Just not seeing where Collins has been overall.....better.