Is there a difference between Trd Pro and Sr5 leaf springs?

Just wondering if there is a difference between 2020 sr5 and trd pro leaf springs? Also what would be the difference, would the trd pro have a heavier spring rate? Or would it give it a lift without blocks needed?
I purchased trd pro strut take offs from someone and they said that they think the sr5 and trd pro leaf springs are different and might effect the ride and ride height in the rear.
I’m willing to install blocks but need to know the difference first and if anyone knows the rear block size required to reach trd pro height if there is a difference that would be great.
Thanks

 

Here’s an e-mail another member received from Toyota about the Pro’s leaf springs vs the OR’s leaf springs.

 

Thanks. I read somewhere in here that they are also progressive leaf springs?