I bought a 2019 911T last May, and a 2025 Emira last week. I got the 911 used with 30k miles, and paid about the same as I did for the Emira.
Dunno about outright acceleration, as I am still breaking it in, so cannot go above 4k RPM, but the driving is better in the Emira. Suspension has a little less sway, steering feels lighter, cornering is flatter. I like!
911 is a little bigger inside, so more comfortable with a minimal back seat. This was important for me, as I always travel with my two dogs. I pulled the passenger seat, and put in a dog bed. I pulled the rear seats and put in a second dog bed, so the size is perfect, and the car is low enough my 16 year old does not need to jump up to get in. Door is longer, so ingress/egress is easier for me. Emira has a little shelf in the back, OK for a couple of bags of groceries, but no way to fit a dog. Dogs do not get to go in the Emira anyway - I bought them a 911, they should be content with that.
911 is more common, Emira is more exotic, and looks better than just about any other car out there.
Infotainment on the Emira seems a lot more complex, though 6 years of evolution between the two might be to blame. The 911 still has 5/6 analog gauges, versus the all digital trend almost all new cars have.
I like the manual Emira 6-speed better than the Porsche 7-speed. The 7-speed uses springs and double springs to manage shift gates, and if you are not careful, you can do a 7-4 shift, or 6-3, instead of a 7-6. Flip side is that I have gotten really used to the Porsche 'auto-blip' rev matching that you get in Sport mode, so when you go into a corner, you can focus 100% on brake pressure without having to toe-heel. The Emira also has pedal placement close enough and pedal travel matched so toe-heel is quite easy, just no auto blip.