Other than the boot loader and the ios is there any difference between these two cards??? If the boot loader and ios are changed are they compatible in both the ubr7246vxr and the cisco7206vxr???? The reason I as k is we have a ubr7246vxr but need the i/o, the lead time on this is pretty long, and we have a c7200-i/o-2fe/e on the shelf, which we could use in the interim.