Or just go to a bordering state, buy one, and come back

OpenSUSE will almost certainly feel slower and heavier than Arch on any given hardware. Zypper is way way way slower than pacman, more stuff is installed out of the box, and at least personally I see a lot of slowdowns due to BTRFS doing various maintenance. There are a lot of great reasons to use OpenSUSE, I’ve been using Tumbleweed on my desktop for years, but this is not one of them.