Given Vine's stature, I've always imagined his lung capacity to be at the higher end in the peleton.
Moreover, a naturally high VO2max - which is now being further optimized, just like all riders in the peloton optimize everything they have potential for, down to the last detail, plus his completely natural focus on this due to his history, yes, he could easily be regarded an Indurain type of rider, IMO.
However, Indu had an extremely low resting heart rate in addition.
Though, I still have the impression that Vine is something in-between, speaking rider type;
Many of Indu's forces (OK so maybe at lower level), but who then lacks the last bit of stability and natural recovery to be GC potential. If that part succeeds for him, then I really can't see any limitations for him as future career goal.