@Kajetan321 You should consider the effects of NUMA/vNUMA in terms of performance. Crossing over to other physical CPUs or memory banks will create slowdowns.
If possible, unless you absolutely need all those VCPUs on any or both VMs, you may be best off splitting the 36 VCPUs and assigning 18 on each VM, checking to see if all the memory stays with the bank(s) of those specific VCPUs. See my articles on the CUCG site about NUMA and in particular, graphics performance (and of course, calculations will also be affected). Best would be to
run benchmarks with both configurations. Shrinking the number of VCPUs on a running VM can lead to issues (as indicated in the video posted just before my response).
See the Tale of Two Servers articles here for details: https://community.citrix.com/profile/46909-tobias-kreidl/#=