Hi My girlfriend is studying to become an architect. She is using very demanding 3D-redering programs in her study. Now she is about to buy a 15 inch MBP. I am trying to help her to decide on which of the 15 inch MBP she should go for. Can anyone tell me how great the difference is in graphics performance between the the MBP 15 with and without the AMD Radeon R9 M370X? I haven't been able to find benchmarks comparing it.