The core CPU and GPU is the same. However, keep in mind that memory and storage is not part of the SOC, so HTC can use whatever memory and storage they want. As an example, LG uses dual channel memory and a sort of dual channel/raid setup for storage in order to improve performance (in their dual core phones, they call this technology "tri-dual" technology or 3D for short for dual core, dual channel memory and dual channel storage). As a result, with the Revolution having essentially the same SOC as the Tbolt, it blows it away in benchmarks. However, 2D and 3D framerates were the same as my I2
How this translates to real world performance depends on your real world usage. You might not see better performance for your games. Your light weight apps probably won't improve in performance. Your battery life might improve due to less time required for memory and storage access (the Revolution supposedly destroys the Tbolt in battery life, but I don't have much info on this). You might only see improved performance for your heavy hitting apps that have high memory and storage requirements (ie: Slacker Plus or Premium for the caching feature).
HTC Incredible 2
CyanogenMod - Nightlies