I can't really say much about VMware, cause I've never used it. But I can give you some perks of VirtualBox if you want. Some may be shared by VMware, I don't know.
- Supports both 32-bit and 64-bit guests
- Supports experimental 3D and 2D acceleration on Windows guests
- Native support for many Linux distros, as both host and guest
- Shared folders and clipboard
I have VirtualBox and use it incessantly, so if there's any specific feature(s) you want me to tell you about, let me know.