I'd say, you have asked about what is probably the most popular 2 evo versions, with the exception of rare limited edition models. Either will tick many boxes for many people.
If the heritage is important, then i'd go with the TME, if not then for me its a no brainer, 9GT, best of the 4g63 engine, in my opinion the 9 is the better looking of the 7/8/9 generation, and also simply, several years younger than the 6.
But, if you want a complete toy, for occasional weekends and purely a bit of fun when you fancy it, a 6 does have more the feel of small fun blast of a car, the 9 though comes into its own if the car will be used often, even if not as a daily. If for example I was planning a 2 hour drive to somewhere (ie not just a blast for a couple of hours), i'd choose the 9 over the 6.
I had a 5 as my only car for 13 years, and I never got bored of it, loved it for a play, and as I live on the job and so dont do many miles, it wasn't a pain for general driving. But if I had had to use the 5 daily I suspect i'd soon be wanting something a little more refined. As it was with the 5, I found myself not looking forward to longer drives if I had too, often trying to opt for someone else to drive with their car :lol:
Stu