Both are for the wrong cars though
The 360 is not a spider and that is a 986 Boxster S with around 50 less horsepower and smaller rubber.
The nearest on fastestlaps is a 981 Boxster which has around 15hp more than Broccers 987 3.4 and does a 7:58. Assuming the 360 spider is heavier and therefore slower than the coupe, I expect the Porsche would match or may even slightly pip it round the 'ring.
On a shorter / slower circuit with less of an emphasis on power I imagine the Boxster would probably beat it, at least, based off those figures... hardly conclusive but I would say probably makes Broccers point that performance wise its a lot more money for not much more.
ETA: Just seen Rich's post re a 8:18 - may well split the other way then.