Yes I recall the older 335i was a coupe, a bit lighter and lower CoG. Plus early 335s were producing well over rated HP.
A note on the ZL1, VIR favors big HP over handling even with the grand course, but it helps for a car to have both.
Also I felt the M5 took some laps to gain ultimate speeds unlike the E92 M3 you can go fast in immediately.
2015 M5, Alpine White/Full Black: Exec Pkg, Driver Asst, DCT, black 20s, More...
2014 X4 M40i, Long Beach Blue/Ivory-Black: Cold Weather, Technology, 20s w/PSS, Cameras, More...
Gone '13 X3 35i, '12 335is, '11 X5 50i, '09 Z4 35i, '08 550i, 06 X3, 06 650i, '02 M5, '99 540i