Ok, never really looked too closely at the specs, but it seems that Ice Bear deal in semi-clutch while the Skyteam bikes are full manual.
http://www.icebearatv.com/Monkey-Series14
Come to think of it, I had called Ice Bear a few months ago, and the (quite rude) woman who kept telling me "we don't sell retail" finally, after asking who is a dealer for them, finally did steer me to the 'megamotormadness' site--my guess is, like my theory of 'powersportsmax' being a retail dealer for Roketa (the wholesaler), megamotormadness is the retail site for Ice Bear.
Member 'Barnone' got his z50 Ice Bear sidecar from another site, however, which he mentions somewhere on mychinamoto, unless he stated it here, too, on one of his monkey bike threads.
I think the Ice Bear bikes are probably the same quality as the Skyteam bikes, but it seems like they always ask a premium over Skyteam bikes.
Here is one place with the CT70 replicas from Ice Bear that is very comparable to Skyteam in price (price includes shipping)
http://www.motobuys.com/monkey-bikes.html