I had a Solaris.
I now have a Sherpa.
I’ve said this a couple of times on here and the following are my personal thoughts as I know the Solaris is a well reviewed bike.
I found my Solaris to be closer to a 29er BFE than a 29er Soul. I went from a Soul to a Solaris and found the frame too stiff for what I was expecting and wanting.
I ran my Solaris with a 100mm Reba with a 2.25″ Ardent out back. clearance was tight but not troublesome.
My Sherpa feels more compliant and closer in feel to what I wanted the Solaris to be I.e. a 29er Soul. It’s slacker and feels more comfortable than he Solaris did with a 120mm fork.
I’ve had a couple of Cotic frames and love the stuff Cy designs but the Solaris wasn’t for me.
Both frames are/were XL.