Well, I don't see any difference really
. Sometimes, if I look at G-force meter there is diff by 0,01 (!) G, but only for 0,5 second. Notice that this is difference between minimun and maximum pressure, which is pretty wide in LFS.
Easiest way to see the difference is taking own car and feel it by own body.
Even in this shitty program 'Vroom vroom', where they're tuning astra to achieve better drag time, BIGGEST difference gave them pumping tyres. Not sporty exhaust, not alu rims, not sporty filter.
Please put theory away and try it by yourself IR.
I'm here in the name of Superb Acceleration with High Pressure!