Ready to go over to a C-Beam build, but which one - Workbee / Sphinx

As titled, I am finally prepping to move over from my existing build (Ooznest Ox 1500 x 1000 double belted) to a C beam set up of 1000 x 1000

I'll be selling the existing Ox and starting from scratch (will need to decide on a price before i stick it on ebay etc)

The question is which do I go for? They are both well specced builds with subtle differences (Z axis for example on the Sphinx is fixed with the 'plate' moving and on the WB kit the extrusion moves)

In my eyes there is not a lot in it, so any opinions on either build would be appreciated.

I'm sure i'm not the only one in this dilemma...