I dont know. I havent driven an SRT so take my opinion with a grain of salt but, there are many reasons why I chose a NA roadster over an SRT. First and foremost was the lack of a 6 speed. A true sports car/GT style car is not proper with an automatic. That broke the deal from the get-go. Second, that wing. Rearward visibility in the roadster is not the greatest with the little wing down. When its up, even worse. The NA at least can be driven with it down. Next deal breaker for me was the seats. I wanted leather, real looking and feeling leather. That alcantra stuff looks cheap in my eyes (only opinion on that!). The final box checked no was the wheels. I dont like them and wouldnt want to clean them.
Once again, all my opinions but I am super happy with my NA and wouldnt take an SRT unless it was given to me.