So let me get this straight, an X5 with the 4.4 accelerates hard enough at 2200 rpm to scare a 993 owner? I might have to try to get a test drive in one.

Newer autotragic transmissions adapt their shift strategies according to how they've been driven. If the two vehicles have had different drivers for a period of time, the transmissions will tend to act differently, especially under part throttle. It doesn't sound like either one has an actual problem at this point.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.