The 328 holds its own but to get a flavor:
Assuming quarter mile times around 103 for the 335 and 13.6 seconds compared to 14.2 seconds for a 328, that is about +\- 6 car lengths. I know the poster above had a different experience but alot of things affect race outcomes (launch, driver skill (assuming shifting)). Some 335 reviews peg the 1/4 mile even lower which just adds to the difference.
Based on the measured performance, it's about 6 car lengths or more.