My second favorite luggage system for KTM 1090 Adventure R - Giant Loop Siskiyou soft panniers. Although rack-less as Mosko Moto Reckless 80, these systems don't have much in common. Mounting is completely different, as well as luggage organization.
Mosko Moto Reckless 80 are my favorite large soft panniers. I have been using them for a while, first on KTM 690 Enduro and now on KTM 1090 Adventure R. While I was very happy with them on 690 (check blog post here), I am absolutely impressed with how they fit on 1090.
I am riding 2018 KTM 1090 Adventure R since beginning of 2018. Shortly after the purchase, Perun moto designed top luggage rack that will match bike’s versatility. After several months of using it, I can say I am very, very happy with outcome.