LB3 is definitely 10% less on ranged than caster. LB1 and LB2 may or may not be 10% as well but the 10% difference isn't even worth splitting hairs over.

That said, it goes in this order of who-should-LB when it comes to AoE LBing:

SMN >>>> BRD >> MCH > BLM

Gotta look at the whole picture, not the piddling 10% difference.