Wide at size 10 is the stated variation
The W makes this listing different from a size 10 title that does not identify width. If the aim is to reduce side pressure without adding length, compare the actual wide fitting rather than assuming a larger ordinary size will achieve the same result.
Width does not establish insert compatibility
The 12W offer is another wide-size route, while size 9 is a separately listed comparison. A W designation can help narrow the search, but it does not identify extra depth or compatibility with a prescribed insert. Ask the footwear manufacturer about the required insert’s compatibility before assessing fit with it.