Rio Seio vs. Tunze Stream?

[AJ_77]

Have seen these new high-flow, low-watt Rio "stream-type" powerheads mentioned a few times lately. Those of you on RC a lot - what's the buzz on these? They look too good to be true... even though they're not close to the real Streams, their specs are pretty impressive.

Here's a Review.

They are in last month's specials at SWC as well, so I'm curious about them.