No, that is what Cinebench is there for.
And if you do not want to run benchmark software, you could always look for scores for the GPU you have in your MacBook Pro (System Profiler > Hardware > Graphics/Displays) and scores for the current GPU used in the
MacBook Pro with Retina Display (NVIDIA GeForce GT 650M).
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Not that, but I also could not find Cinebench scores for the ATI X1600.
Maybe these two articles can help:
http://www.notebookcheck.net/ATI-Mobility-Radeon-X1600.2163.0.html
http://www.notebookcheck.net/NVIDIA-GeForce-GT-650M.71887.0.html
From the look of it, using the
3DMark 05 benchmark, the
MacBook Pro with Retina Display GPU is almost six times faster.