The specs above don't hint at any great performance improvements over the 6400M and 6500M series. Yes, the 7500M has 80 more stream processors than the 6500M, but the 7400M is also saddled with half the memory interface width of the 6400M. At least all the 7000M-series GPUs have UVD3 video decoding blocks, which support DivX and XviD video acceleration. You might remember that some of the 6000M-series GPUs, including the 6500M, feature silicon repurposed from the Mobility Radeon HD 5000 series and thus have older UVD logic.
Source: The Tech Report