Very, very unlikely to be a rhizo - they’ve been illegal to import for awhile now and it’s extremely uncommon for them to be collected/imported (accidental or not). As far as I know, no one has reported successfully fragging a rhizo and I haven’t heard of any spawning in captivity.
It looks spot on to the balanos from U.S. vendors I’ve seen carrying them the last 6-9 months or so. It wouldn’t surprise me if most, if not all, are getting them from the same supplier/source. Balanos range on pricing depending which vendor you get them from (likely comes down to how many they buy from their supplier) but I’ve generally seen them priced from $10-75.