You can have same ICS for both.
Is it just general question or you are trying something that brings the question in your mind?
Just trying to get details to help you better.
Vikas
Panda ES has OMAP 4460 and your earlier panda was based on 4430.
Below is description of core logic for both of them. There is performance improvement in core logic.
This is in terms of the hardware improvement.
Would you feel difference for your normal use? You can try and let me know!
If you run some software benchmarks then I believe the numbers will show performance improvement.
Can your eyes catch that improvement?
It really depends on what you are trying to use the boards for and what kind of applications/ end use you intent to run on the board.
Depending on that we can look at tuning.
Vikas