unless you've maxed out +hit, the bloodtinged gloves are better. +1% hit equates to +1% damage. these gloves have 8 more spell damage, but if your frostbolt/shadowbolts hit for 800 damage, then +1% damage is the same as +8 spell damage. bloodtinged gloves also have better stats.

as a warlock, i'd take either of these gloves over t1. 27 damage or 9? not a hard decision.