Have not tried them myself and won't be paying that much for a maxamps pack, but for $40 I may just want to try a pack from hobbyking.
i wouldn't be surprised if they were the exact same cells. the dimensions are all the same. the ratings aren't though. i wonder why...
They say a good mechanic only needs 2 tools - WD40 & Duct tape. If it moves, and its not supposed to, duct tape. If it doesn't move, and its supposed to, WD40.