Compare and contrast hmmm? Man, they are so different yet one thing jumps out at me: they are both eminently tunable. By that I mean they both have similar levels of technology and they respond to old fashioned mechanic-ing. (Is that a word?) Make a timing adjustment, tweak the air-fuel mixture, it doesn't matter. The Mercedes seems more refined, the Jaguar gives away its racing heritage. It is after all, a massaged D-type for road use. I love it dearly and would never get rid of it.
Thom

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1987 300E
1967 Jaguar E-type Series I, 2+2