Could also be preference and driving style. I ran faster times on my coilover setup vs my strut setup but ive also never felt the trd.One imo striking point of attention is the front vs rear spring rate/frequency.
TRD springs are front 100 vs 200% rear.
Most/all after market is about 100 vs 150% like the standard spring rates.
7 kg and 10 kg not even that.
The purpose of the relative rate is the response rate to directional changes; the time the rear suspension ´lags´ behind the front wheels.
As the fronts are steered and the rears not, the rear suspension always is going to be adjusting to a directional change later* and having a higher frequency reduces the delay. The TRD set up is thus quicker; making the car more responsive to directional changes.
* the ´Scandinavian flick´ is based on this