Even if the thermal cooling doesn't give Canon sensors as high a DR as SoNikon Exmor, thermal cooling combined with two additional bits should give them better overall DR (assuming Canon doesn't jack up ISO 100 read noise to 100e-!!! :''''( ).
Um, what's this thermal cooling supposed to be exactly? A fan on the side of the camera? Heat dissipation through a part of the camera that has a "never touch here" sticker on it?