I don't know about the guys in question but I really like Teddy Atlas, he's my favourite commentator by far.

As an armchair fan with no real boxing experience I find Teddy Atlas to be incredibly insightful both during his pre fight tactics slot and during the fight.

He helps explain the dynamics of the fight far better than anyone on HBO who usually (although entertaingly) ramble on about stuff completely unconnected with what's going on in the ring.