Questions about Hyper-V 2012R2 licensing compared to 2008 / 2008R2 licensing

For a 2 socket CPU Hyper-V 2012R2 Std server 2 node cluster server 1 2012R2 Std server license is needed for each host. This 1 license covers 2 VM guest licenses. If this 2 node cluster runs 8 2012R2 Std VM guests an additional 3 licenses are needed for each host, totally 8. Each host needs to be licensed for the 8 guests, guest licenses can't be transfered to an other node. So for a 3 node server that would be totally 12 2012R2 Std server licenses needed, right?

How is that for a Hyper-V Enterprise server 2008 2 node cluster? For a 2008 Enterprise server 4 VM's guests licenses are covered. If running an additional of 4 2008R2 Std servers, on this server 2008 Ent hosts, can for server 2008 these licenses be transfered from one host to the other, or does also each host need to be licensed for the 8 guests? Totally 8 extra 2008R2 guest licenses for a 2 node and 12 2008R2  licenses for a 3 node cluster?

Does a 2012R2 Std server license also cover 2 2012R2 VM guest licenses on a 2008 Hyper-V server?