IPv4, IPv6 QOS.... how do they interact?

Simple question.

My main concern is:

  • I have both IPv4 and IPV6 on a queue tree. They obviously seem to be separate - so how will the bandwidth be split between v4 and v6? For example trying to envorce priorities in 6 priorities over a limited bandwidth link.

put them on different routers.
it will well worth your money and your time after doing that.

two routers fighting for the same limited bandwidth and now they cant see each others usage at all?

based on my trials, they each IP, regardless of v6 or v4 will be treated the same.