Its all a bit bizarre really. So according to the above an XL tyre can support a heavier vehicle than a standard "non-XL" tyre.
Implying a 101 XL tyre can support a heavier vehicle than a 101 non-XL. It pretty much makes the load rating gobbledegook. It would make more sens to get rid of the XL bit and call a 101 XL tyre a (for example) 102 tyre. Current system seems a bit stupid.