It’s a tough choice, but as said above they are very different cars and I love them both. I think which one you choose comes down to few things. Some of the following may seem a bit harsh but best to say as I find (had the car 4+ years).
Costs – You probably know all this but may help. The 718 is an expensive car to maintain, my car is a Jan 17 Base 2.0 and my recent service at Porsche (with no additional work and a clean bill of health) and 12months Warranty extension was around £2.5k. If you want to keep the Warranty valid (in the UK anyway) you can only use OEM Parts including N rated Tyres, OEM Battery etc … everything. MPG pretty good for a 300bhp car especially on a run. Insurance is very reasonable as well.
Where you live/drive – I live on the South Coast and do quite a bit of town driving. As mentioned by others, to me the gearing especially 1st to 2nd is long BUT you get used to them and forget about it completely after a while. The 718 is the only car I have stalled when pulling away that I can remember and I did it a couple of times when I first got the car, I don’t think the Stop/Start helped to be honest. My car gets a lots of attention added by the colour, mostly as far as I know good, it also sounds pretty good in sport mode with a few gently pops and rumbles. If you regularly park somewhere where you wouldn’t want to be worrying about your car while away from it, its possibly not the best choice. Drive the car on a sweeping country road and its pretty impossible to beat and quite fast enough, its also really comfortable surprising as I have 20” wheels. If you are mainly driving in a town environment I would have more fun in an MX5 I think, smaller, nippier, snappy gearchange etc.
Mine has PASM so is lowered by 10mm, not an issue on speed humps round here or my relatively steep drive (if I am careful) but I can’t take the car into the Office as the underground car park is just too steep, so it wouldn’t be practical as my only car.
Quality – now bear in mind my car is a Jan 17 car. The interior is still as new, perfect not a mark and everything works as it should. Foibles, I don’t like the way that the tail and headlights mist up on a regular basis, apparently it is normal, just looks terrible IMO. The passenger seatbelt clip needs to be pushed right up to the top when not in use or it knocks. I have had a couple of odd things happen, the electronic handbrake wouldn’t disengage and I had a few odd dashboard messages that never reoccurred and I assume didn’t show up when Porsche scanned the car – check left tail light, check right tail light. But both were fine. I wonder if this was caused by low battery and the car not be used for 2 weeks – no idea, but all ok now. Everyone has their own thoughts but I wouldn’t own one without the Warranty just incase.
Perhaps I am on the only one that finds this annoying but oddly that when you wash the car the water gets under the hood and sits on the plastic trim surrounding the Frunk, not an issue if you remember to open the Hood at the end of every wash and wipe over, but does seem like an odd design, my 987 Cayman was the same.
Good luck with whatever you decide no bad choice.