You're doing the right thing so far with the smaller one by keeping him on paper towels. I would use Vetericyn on the smaller one's wound, you can get it at Petco or Amazon. In the meantime Neosporin without painkiller will be ok on it. Since Vetericyn is a water-based gel rather than a petroleum-based ointment it doesn't cause scale damage over time like the Neosporin can, and that wound will need to be treated for quite a while.
I would also offer him multiple smaller feeders rather than one big one to keep the skin from stretching and re-breaking while it heals. When he sheds don't be surprised if that area bleeds a bit when the scab comes off, just continue treating it. Obviously whenever he makes a mess his tub will need to be completely cleaned and sterilized.
Don't try to get weight back onto the larger one too fast, if he's offered an appropriate-sized feeder weekly he should be fine.
For both, if they take f/t or pre-killed offer the feeder wet or at least damp, as taking in the extra water will help them to rehydrate.
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