Like his descendant, Fletcher is a man of few words who prefers to let actions do the talking. He seems to be just as intelligent as his descendent but has yet to live up to the expectations of engineering, and seems to prefer using simpler tools to get jobs done.
Rhode Island is very resourceful and cunning. Unlike most other alternate-Ferbs in the series, Rhode Island seems to prefer using simpler and pre-existing tools to get the job done, like a long roll of rope.
Ohio Flynn and Rhode Island Fletcher are partners in archeology, how long they have been doing this is however up for debate. Though Candace's reporting on them indicate at least one job prior to "Phineas and Ferb and the Temple of Juatchadoon".
Rhode Island has yet to express an opinion on Isabella, her mother or the Unnamed Buford or Baljeet look-a-likes. It is unknown if he had a run-in with Doofenshmirtz like Ohio did, though it is likely.