Vinyl is much tougher and the sphera is mostly for large commercial spaces so my assumption is that it will be piss proof in a domestic setting. Lino is hemp /linseed etc so a bit less tough - still fine to use but does wear /stain after a while (10yrs ish in my experience.
Can I check, are you saying the sphera is more piss proof? I'll probably get some kind of vinyl/lino on my bathroom floor eventually.