Can I remove the pve-qemu-kvm and install the qemu-kvm that I find in linux-kvm.org?
There is any dependency with other packages?
Don't get me wrong, but both of them are beta versions. Do you really think we test what happens when soemone replaces one beta package with another, and mix different beta versions?
You can simply check those things yourself. Anyways, the resulting version mix will be unsupported.