I played a with BM Sorcerer, Sniper & Operative, long before and after they got BM. The sniper never lagged behind.
He hit low armor targets harder then my Op, high armor targets lower (not that either of us hit tanks very hard :/). His damage projection outclassed mine leading to higher damage done.
We had about the same CC. I got knocked back, he got LoS'd.
The only reason I'd rather take a sorcerer over a sniper is sorcerer utility is second to none. From a pure DPS standpoint the only problem with Sniper is their silly-*** cover mechanic; it just needs to be scrapped.