The difference more noticeable from the start to 60mph
Acceleration at the speed of 40-100mph is not noticeable that much.
+ and of course red calipers.
I would suggest packing up with more options instead of S. However, it is your choice
For general driving I ignore the “overboost” power figure and just comparing power the 4S has 28.5% more power than the 4, so pretty substantial.
For comparison the GTS has 5.6% more power than the 4S, the turbo 21% more than the GTS.
So the 4S is the sweet spot engine performance wise.
Problem is as the "std" specs differs country by country, answers such as what is / isn't "standard equipment" between both car variants and cost comparisons are all irrelevant to OP unless answered specifically to the country specs /costs available to him
Best thing OP can do is as tbinmd suggested .. spend a few hours on his countries configurator comparing specs, standard equipment prices, taxes, add ons etc etc