It's interesting, the differences between them -- being from different universes. This includes Ratchet who is much bolder (if not crankier) than the one he knows. Yet they both still share the medical passion.

He stands back, straightening up.

"Theres are so many things from your universe that are different and then some that are so similar. I wonder how vast the possibilities extend. Do the schematic or biological variances make your job difficult?"