Hi Angus
The US version of the small Dewalt has the 600 series numbers and the European (certainly UK) numbering scheme is a 26000 series. Apart from the voltage the only other difference that I can spot is that power lead exit at the top.
I think for me it is better as I suspend the power cord and my vacuum hose from a bungee stretched across the ceiling of the workshop. That way the power lead is plugged into my Dust Hub (yes there is a video about it) next to the take-off for the vacuum.
Peter