Well so far after driving my e53 again today I was very surprised how much peppier the E53 is over the turbo e70. No doubt in a drag race my e70 will smoke my e53. Heck from the numbers it would probably smoke everyones e53 but my e53's throttle is so much more sensitive than the e70's.
The e70 does have gobs more torque feel to it. Its very strange the way the e70 stays around 1100 rpms or so most of the time around town where the e53 stays up around 2k or better all the time.
The 8 speed automatic is much nicer shifting wise too. Still it felt like home being back in my e53