Brian,
The Sprinter and Crafter used to be one and the same, much like all the Sevel variants, but since the split of VW and MB in 2016 they have been unique designs.
Here is a not too recent article on the differences https://www.vansdirect.co.uk/blognews/vw-crafter-vs-mercedes-sprinter-what-are-the-differences/
Keith.