I think this thread is making two blatant mistakes in generalizations...
1. Grouping BMW's and considering them similar...they is a tremendous amount of diversity/differences in their product line, not just across models but over time on the same model.
2. The perfect bike for an RTW exists and arguing on a forum will discover it...the Holy Grail might be easier to find. In choosing a bike for an RTW trip, the rider's route, riding and mechanical skill level, etc. are big factors in giving him flexibility in bike choice.
BUT I do agree with a prior poster that we should not propagate the marketing, forum hearsay, etc. of bikes we've never ridden or owned for a significant period.
DISCLAIMER:
I own and rode a 93K75s with 50k miles before the trip, around the world...putting 33k miles on it in the process in 2007.
That bike crossed the Sahara twice(Western Route and via Niger, Algeria), the Stans, Mongolia, and to Vlad(via the Zilov gap)....in one singular trip. It is not considered by many to be worthy of off-road worth but it handled its business with no real issues.
So I am partial to defending the BMW brand on that specific model. BUT since nobody considers it an Enduro, I won't have much defending to do