I have a desktop and a steam deck. I would like to setup some old games I have on disc on the desktop. Then compress them and decompress on my Steam Deck without doing the full install again. I understand that with wine/proton prefixes they should be installed to a "fake c:/ windows hierarchy" can I just compress that and copy to a different Linux machine? Does it save which proton version was used? If I use something like Lutris or bottles can I import into them?
Lutris uses separate prefixes and doesn't do any deduplication. You will need a separate tool for that or just use a filesystem like btrfs that supports deduplication.
I've never used bottles, so I don't know how it handles deduplication.