981 Cayman S vs GT350
 

Which one would you have?

Neither. I would rather have a Nissan GTR!

Apples vs. oranges.

For daily drive, tracking, or attacking innocent bystanders?
You've got to specify...

I'd choose 981 Cayman S. 1000%. The GT350 is a super sweet powerhouse, but I don't imagine it would come anywhere near Porsche's refinement, handling and pussy-magnetness. Yes that is a word.

No other cars are options here people ... ahem GTR

You can only have one fun toy that fixes your performance niche. Back roads, normal everyday trips, track days, etc.

981 Cayman S has a resemblance to our Z's body style imho so I choose it :D

In that case, it's time to expand your options :stirthepot:

Slurpppp. Needs salt.

Yes, definitely more and better cars out there.

The Nissan GTR is an amazing piece of engineering, with a somewhat dated but distinctive appearance. I think it's too expensive for what it is, and cannot see it holding its value (but neither will the ubiquitous Mustang Cobra). For peformance, GTR looks great on paper . . . until you get to one particular line on the spec sheet. It weighs twice what my car does, and for why??? That's why, on the track, they are known for eating their own transmissions and needing long periods to cool brakes between sessions. Tire temperature management has to be critical on this car in high performance situations, too. For me, that makes the entry from Stuttgart a far better option. Looks, cachet, comfort, and performance in one tidy package. Yes, it screams "dentist", but at least affluent dentist.

The GT350 R is a good derivative of a proven winner. I'm not sure what it is good for besides getting nods from owners of lesser Mustangs. It will still get eaten alive on the 1/4 mile by modded cars that look far slower. But to me Ford made a better choice than FCA's Hellcat pair. Your mileage may vary.

I'd take a hard look at the Alfa Giulia Q. Saw one this week and was truly impressed. You get to bank a healthy difference, too.

I will second the GTR ...a used GTR will rape both the cars mentioned.

Those two cars, plus the gtr are different driving experiences. You should drive each one and see what is preferred

Also, what is "best" is affected by your priorities

I'm sure they're all good cars.

I don't care about numbers. Faster in a straight line this, better around a track that, it means nothing to me. For me a car is about the driving thrills, fun-per-dollar ratio, and ownership experience and nothing more.

In that case, you need a Mazda Miata.

It's too slow, doesn't sound good, and is too softly sprung.

I do love the look though, especially the folding hardtop version.

Everyone is ducking the original question hard by the way.

We cant answer your question then. "Fun per dollar ratio" " driving thrills" and "ownership experience" are totally subjective not objective like the performance numbers. So it hinges entirely on your opinion ...go test drive them both and see which one you fancy!

Since were talking opinion...I personally feel that the fun per dollar ratio, driving thrills and ownership experience can not be beat after you own a Z....The porsche is overpriced, looks real similar to a Z, has only marginally better performance (which apparently you don't care about anyhow) , not close to being as reliable as a Z, costs a ton more, maintenance is a PITA, after market $$, repair $$... Mustang? everyone owns one, boring ,too common, costs way too much for a rustang, and is muscle car/drag car not a sports car...IMOP