Not too big of a difference in size when you look at it. With a decade in between I have to say the E46 M4 still Looks very attractive for what it is.
regardless of new or your still comparing the second highest trim model to an "M3".The 4 series rear bumper needs a diffuser and a quad tip exhaust. The wheels on the 4 series in this picture are okay but I would still prefer 5 spokes.
Oh yeah for sure, two generations after this is what happened. So if the choices of the E46 M3 coupe and "435i" coupe were to be given to you free of charge, Which one would you pick?4 series looks like an evolved version - and so it should.
The E46 is still a classic design that will be loved for many generations.