Hyper-V Replication

Hi

I have recently setup Windows 2012 R2 Hyper-V replication for VM's in our Dubai Datacentre to replicate to our UK Datacentre. We have a 10MB MPLS link with around 200ms latency. I have the following question:-

VM1 - Has one 38GB Fixed VHDX file with 30GB used

VM2 - Has one 38GB Fixed VHDX file with 15GB Used

Would VM2 replicate quicker than VM1 because there is a large amount of white/unused space?

Thanks in advance for any comments

YL