As far as crash resistance goes, they seem to be OK but not as indestructible as the 11xx.
Some (I'm not sure which model TBH) seem to have wheel rims made of cheese that get dinged easily (but by the same token, can be encouraged back into shape with a soft mallet)
Ive seen them wear through the bodywork that surrounds the tank on a loonger slider down the road, but the tank wasn't punctured.......it just looked expensive IYKWIM
Take spare fork seals....they can go and when they go, they are a PITA to find........we managed to get a set sent across to Zagora from the big bike dealership NOT the KTM one, they were bloody useless) in Casablanca.....I forget the name of them but they're well known and there's a guy there who speaks fair English
We got the seals delivered overnight on one of the big trucks for a very sensible fee
(Ps no idea who that old dosser in the pic is

)
They seem to be a bike that you have to dominate.....The GS is probably more forgiving, but from what I've seen the big KTM needs a firm hand or it will bite back.
They swim better than the GS
(or at least, we didn't have any get waterlogged even though we did try a few times )
Performance wise, a well ridden one will probably ride rings around a GS with a similarly competent rider. (I don't think you'll have any problems Andy, you could tame one)
I'd agree with Tim.....If I was after one, I'd go for a 950
