I like my BMW R 1200 RT, and I really like the GSA, but if I were looking for a large Dual Sport, I would look long and hard at the Tenere.
Even if the Tenere isn't better in the ______ category (fill in the blank), I would be asking myself if the difference is worth the cost when compared to a competitor.
Like if I could get a Honda Accord for $24,000 and an identically equipped Toyota Camry for $18,000 then gee - I would have ot ask myself if the accord is really worth - to me - the extrra $$$.
Maybe it would be - and maybe it wouldn't. As others have said, it's a personal decision.