yeah for sure. in the racing I saw last night the vast majority of the top cars were Porsches but almost none of them were able to finish where they started. If you can put it all together the 911 dominates, but it's incredibly easy to spin off/cut track/make mistakes with.
I'm running the Mercedes as I'm most comfortable with that car. It's punchy, fast, and corners well. Takes care of it's tires pretty well (not great, should have pitted lap 6, stretched it to 7, lost a bunch of time that last lap)