Well I've had a standard 950 with normal suspension height and now I have a 2010 R with the 10.3" suspension. There is no comparison. The longer suspension works wonders offroad. I am 5 foot 11 and comfortable with the height of the bike.
I've owned all the big ADV bikes, except the Tenere. The 990R blows all of them away for offroading.
Do the standard mods, plus a set of pipes to make it sound amazing, and you will be rewarded with an incredible riding experience.