Probably best to contact customer support over this so that we can investigate. I would expect them to be different (because the net is fractured into pieces when using RC), but I can't think (off the top of my head) why they should be significantly different.
In reply to Andrew Beckett:
I have contacted my local cadence support and resolved the issue.
In reply to bnugent:
im having the same issue. what was the solution ?
do you have CCR number ?