I’ve gone back and forth on this one.
I had ST1100, then overlap with VFR700.
Then just 700, then with another ST1100.
Then just an ST1100 followed with overlapping 2000 VFR800. Then that ST sold.
Eventually overlapping the VFR with my ST1300 and the VFR sold.
I say definitely own both together for a while, like, five or ten years.
The VFR is at least something to experience.
I could do 600 mile days across slabs and twisties. The ST is generally more all weather comfortable and still plenty fun in the twisties. I might have kept the 800 but my Blackbird sorta scratches that itch.
If it has to be one bike and you put in some big days consider upgrading suspension.
If you ride in cool to hot fair weather with more riding in the twisties, I’d say VFR.
All weather and using slab to get to the twisties, I’d say stick with the ST.