In terms of overall gaming performance, the graphical capabilities of the Intel G43 Express Chipset are significantly better than the Nvidia ION LE.

The G43 Express Chipset was released less than a year after the ION LE, and so they are likely to have similar driver support for optimizing performance when running the latest games.

Both GPUs exhibit very poor performance, so rather than upgrading from one to the other you should consider looking at more powerful GPUs. Neither of these will be able to run the latest games in any playable way.

The G43 Express Chipset and the ION LE have the same amount of video memory, but are likely to provide slightly different experiences when displaying game textures at high resolutions.

The ION LE has 8.5 GB/sec greater memory bandwidth than the G43 Express Chipset, which means that the memory performance of the ION LE is marginally better than the G43 Express Chipset.

The ION LE has 16 Shader Processing Units but the G43 Express Chipset does not have an entry, so the two GPUs cannot be reliably compared in this area.

The G43 Express Chipset requires 24 Watts to run and the ION LE requires 20 Watts. The G43 Express Chipset requires 4 Watts more than the ION LE to run. The difference is not significant enough for the G43 Express Chipset to have a noticeably larger impact on your yearly electricity bills than the ION LE.