By the end of 2021 I hope we could ride it... I'm about to sell the SMCR this spring... Maybe I'll wait a little bit longer... I'm also interesting about a r1250gsa... Which is really not the same segment... I'm a bit confused I guesd
It looks as though the Norden 901 will be more comfortable for touring than the KTM 890 adv, so will be between that and the BMW in terms of touring and off road I guess. The BMW and the Norden will have relatively low centre of gravity, but the Norden probably be at least 60kg lighter.
Always best to test ride both on the same route in similar conditions on the same day if possible to really compare yourself. I did that with the BMW 1250 gs and the KTM 1190 adv R and bought the KTM.