Hi HavencroftKev,
It might be worthwhile experimenting with the different display settings.
have you tried letting the TV do the upscaling rather than the V6?
Some people just have the 1080p and 1080p (pass through) selected on their V6
Others like myself with a 4K TV only have 2160p and 2160p (pass through) selected and for me the picture is the same on Sky Sports and BT Sports.
Dave
The Service you do for others is the rent you pay for your room here on Earth - Muhammad Ali