I'm not positive about this, but I think they have the same exact vacuum motor. However, the difference is in the power nozzle. The CXL nozzle uses a flat belt and the DXL uses a geared belt. the DXL also uses a circuit board. The early DXL nozzle looks outwardly identical to the CXL nozzle. But at some point, Tristar updated its look. I have an early DXL nozzlewith the geared belt but I use it on my CXL (since I don't actually own a DXL).