I used the absolute lowest and highest settings for both test scenarios. The only apparent difference is in AA, where Nvidia's Windows driver reveals QCSAA, whilst only revealing MSAA on Ubuntu.
On Ubuntu, Nvidia is set to Performance and the CPU governor is also set to Performance. For Windows, it is set to High Performance.
When setting the Anti-Aliasing to the exact same setting on both platforms, VP has made the Linux port keep up neck-to-neck performance with the D3D native Windows version.
My verdict: Virtual Programming have outdone themselves this time. A wrapper port that can beat native D3D on Windows is amazing! AMD and Intel users will likely fare quite differently, since both companies aren't aiming for Enthusiast performance on Linux like Nvidia is. If you haven't got the game already, this is an insta-buy!
I may have made mistakes, and if I have done so, please forgive me and correct me in the comments. I've tried to do this benchmark and review to the best of my knowledge and capabilities.
My small development blog: techpromad.wordpress.com
My alias in ubuntuforums.org: myromance123
About me: I'm just a Malaysian, who is currently working as a game developer whilst waiting for Convocation of his studies at MMU Cyberjaya in Software Engineering and Games Design. Love Ubuntu and Linux, and more so gaming!