I wear a 10 W in my MyJoys Icons.
I also wear the 10 W in my ICONs, mainly shield tips. The ICON saddle is a little wider in the toe box than a shield tip or asymmetrical. With that in mind, the XPS-1 fits closer to the ICON saddle or a DryJoys Tour. If you are a wide in those models I would stick with a wide in the XPS-1.
If you are a wide in the Asymmetrical, you could likely go down to a medium in the XPS-1.
Of course this is not a perfect science and we prefer you try them on first whenever possible.