Benchmark: VMware vs Virtualbox

I tested VirtualBox 2.1.4 and VMware Workstation 6.5.1 for later use as a development VM
Host: Ubuntu64, 4GB RAM, Core2Duo E6600, Samsung HD502IJ
Guest: Windows XP Home, 1GB RAM, 8GB virtual disk
Benchmark Software: SiSoft Sandra Light, HD Tune

What is your experience or suggestion for a VM mostly used for development tools (not as a headless server)?