The flight management on the other hand is completely different. We have lots of guys moving from short haul flying where a suitable diversion is never more than a few minutes away to long haul flying where the only alternate is 2 hours away and guess what.... it's now 25 knots across in a snow storm oh and there's unlikely to be any hotels available for the punters!!
IMO, the flight management principles are exactly the same.
I've never understood why having only one or two alternates versus numerous alternates makes your job harder... Guess what? IMO, when you haven't got a large choice, the decision is a hell of a lot easier!
What the weather is doing at your alternate/diversion/emergency field is a consideration whether it's 5 mins away or 3 hrs away so that part of the equation is also exactly the same. Make a good decision with all the facts to hand...and that includes what you're going to do with 1/2/3/400 passengers.
So, having done both the SH and LH thing, I'd agree the transition from SH to LH is quite straightforward with the right training.