Has anyone compared the performance of bitHopper with, say, multiclone.us.to? I understand that using multiclone means I'm entrusting my hashes to a third party, but apart from that, are there performance differences?

As far as I can see, multiclone currently hops between btcguild, btcmine, mtred and slush (and reverts to "solo" mining if nothing fits) whereas bitHopper seems to use a set of different pools. Wouldn't it be most efficient to have the largest possible pool of pools to hop between?