The detail is here
Pro $100 – Built for real projects. For those who use advanced tools and models throughout the week with 5x higher limits than Plus (and 10x Codex usage vs. Plus for a limited time).
Pro $200 – For heavy lifting. Run your most demanding workflows continuously, even across parallel projects, with 20× higher limits than Plus.
https://help.openai.com/en/articles/9793128-about-chatgpt-pro-plans
So “Pro Pro” still gives you significantly more fire power especially beyond the limited bonus period.