The 335i also has BMS JB4 G5 ISO piggyback with complimentary flash tuning courtesy of the BimmerBoost flash software. It is nice to see users benefit from BimmerBoost's software development to open up tuning for the platform. Clearly @Sick335 is showing his appreciation in practice .
The 335 ends up pulling up top decisively against the M5. The power figures between the two are likely fairly close but the 335's power to weight advantage is far too great for the M5 to overcome. Hopefully the M5 owner gets a tune on his car and this comparison can take place again so the M5 can show what it is capable of.