How to mount USB drive on VM under VMWare or Virtual Box on OS X

You could install linux on your MBP and retry the benchmarks. That would eliminate the issue of hardware differences, wouldn't it?

Try the Tokamak Networking Scripts for VMware Fusion, they provide advanced networking setup and might possibly do what you're looking for...

WARNING: If you have a Home Directory protected by FileVault, DO NOT INSTALL FROM WITHIN THAT DIRECTORY! It will mess up FileVault (happeend to me once)

EDIT: You might also try this thread on the VMware community forums. An exerpt for you:

After seeing this post by powervm: http://communities.vmware.com/thread/151384?tstart=0

I was able to get bonded nics/link aggregates to work.

edit /Library/Application Support/VMware Fusion/boot.sh and look for the vmnet-bridge section and edit accordingly.

vmnet-bridge puts itself in background (daemon mode)
Bridge to host network interface 'en0'.
"$LIBDIR/vmnet-bridge" -d /var/run/vmnet-bridge-vmnet0.pid vmnet0 en0
Bridge to host network interface 'en1'
"$LIBDIR/vmnet-bridge" -d /var/run/vmnet-bridge-vmnet2.pid vmnet2 en1
#"$LIBDIR/vmnet-bridge" -d /var/run/vmnet-bridge-vmnet3.pid vmnet3 bond0
Bridge to the primary host network interface (which can change over time).
#"$LIBDIR/vmnet-bridge" -d /var/run/vmnet-bridge-vmnet0.pid vmnet0 ''

Edit the vmx file for your virtual machine and change 

ethernet0.connectionType = "bridged"
ethernet0.vnet = "/dev/vmnet0"

to

ethernet0.connectionType = "custom"
ethernet0.vnet = "/dev/vmnet0"

make sure fusion isnt running and restart it with

sudo /Library/Application\ Support/VMware\ Fusion/boot.sh --restart 

Im not certain what speed im getting on the link in the VM, as task manager states it running at 10mb/s as does the driver. But I have network connectivity, which is all I wanted.