suspension difference sport vs sr5

Besides the shocks, are there any spring differences between the stock
SR5s and the TRD Sport?

How much ride quality difference is there between the two buzzing down the freeway?

I had a 2005 3/4 ton dodge that was horrible to drive unloaded on the Cal freeway.

I am just trying to understand how they compare from you owners.

 

I've never had an SR5 PreRunner just TRD Sports but I think that the sway bars are different than the OR and the Sport has lower profile tires on 17" rims which can harshen up things a bit also.
I'm currently driving my 2015 around without a shell until my new one comes in and though it is not unpleasant it is much better ride with a shell on from my 2010 Tacoma.