2) IOT is considerably shorter (7 months vs. 12 months) and you're not wasting time learning a skill that you won't use i.e. boat driving
UberP
All of us ex-RN would say that 12 months by the sea (and the summer totty) beats 7 months in Lincolnshire. When you add on the hold-overs in today's RAF (and the non-jobs while on hold) I don't think that the 5 months is an issue. If you do need to hold in the RN at least it's by/on the water