Twenty years ago sport bikes were King. I'd go beginner if I were you. These days, sport bikes are dead.
Take away... Might as well get the Litre-bike; I would lose as much money on the resell of the 600 as I would have to pay for extra insurance.Depends on what the buyer is looking for.
Ha ha!
These days, I'd say the beginner-friendly bike. I feel like the sportbike market has been pillaged by all of us getting older, and moving towards ADV-type bikes.
I bet a friendly dealer in your region could give you a good read on this.
Maybe I can avoid squidly behaviour and pushing it until I get it on a track; I have a lot more patience and will power now than when I was a younger man.