I don't think we were on the same page. I was comparing 2020-2021 Turbo with 2015-2018 Turbo. Car & Driver reviews and test results were used. In their tests, the 0-60 time for the 15 Turbo was 4.2s, the 20 Turbo was 3.5s. Different dates, different environment, may be even different tires... there's no way to know. In the 2020 Turbo review, they briefly mentioned that it's a tenth of a second slower than the 2018 Turbo w/PP.Maybe I'm misunderstanding you but I think you are comparing apples and oranges. I'm not giving any subjective opinions here just raw numbers. If you go to Porsche's current website for the 2nd Gen Macan Turbo its stats are listed at:
2nd Generation Turbo
434 hp 405 tq 0-60 mph 4.3 sec top speed and 167 top speed.
The numbers for the 1st generation Turbo performance package (as given by Porsche):
440 hp 443 tq 0-60 mph 4.2 sec top speed and 169? top speed.
COBB Tuned 3.6L" (my computation using Cobb's 93 Octane peak gain stats)
474 hp 559 tq 400 (400 hp +18.56% and 406 tq +37.7%)
The 0-60 mph times are those given by Porsche. For whatever reason Porsche uses conservative estimates. They are significantly slower than the test times reported in MT, C&D, etc. for both the first and second generation Turbos. Typically they are in the 3.7-3.8 range if my memory serves me.
My first Macan was a 2015 Turbo I ordered in December 2013, delivered June 2014. I don't remember when I had the Cobb installed but it was early on. My second Macan was a 2017 GTS, ordered Mar 2016 and delivered June 2014, also had Cobb installed. My experience with them on both Macans was not as satisfactory as with my 991.1 Turbo S and 991.2 which I still own and drive.
I traded both Macans in at different times and now drive a Cayenne Turbo Coupe. I'm waiting to see what Porsche does with the Macan EV next.