Two capsules of Visbiome is a pretty low dose. It might have a small effect on delaying or preventing pouchitis, but the dose does matter. If you have no problems with pouchitis it may be a waste of money. My dose is equivalent to 32 capsules per day, at least when VSL #3 is available, and it does seem to help me with pouchitis. There is no appreciable evidence (as far as I know) that it helps with cuffitis, though it does help some people with UC, which can be very similar. An adequate dose is hard to pay for without insurance support.
Florastor is said to help prevent C diff. I’m not aware of any effect on pouchitis, cuffitis, or UC. If you’ve never had C diff it’s probably a waste of money.