I had the reverse problem on the 3.7l. FoMoCo don't make the original and have supseded it with a longer unit.
If it is shorter then there is less filtration area logically. I would check with the supplier.
DaveW has as always documented the filter on an S1 in his how to articles
Oil filterEarlier in the article he states "July 2011 update on oil filter.
The equivalent Jaguar filter is quoted as XR8E6714AB
On the box it now says XR823395 - but filter stiil shows first number."
Most of that number matches your filter, but again I would check.