There is little difference between the M2 Max and the M1 Max in terms of graphics performance, and the exact difference is difficult to quantify. There are significant differences in hardware such as cpus and Gpus.
The M2 Max has a higher number of CPU cores and GPU cores, as well as higher unified memory and storage capacity, which makes it better able to handle intensive tasks and games.
In specific applications, the M2 Pro 16-inch MacBook Pro was 20% faster than the M1 Pro and 80% faster than the Intel Core i9 when animation rendering in the Motion app. This shows that the M2 Pro has a significant advantage in graphics processing. So, while there may be some differences between the M2 Max and the M1 Max in terms of graphics performance, there are bigger differences between them in terms of other hardware.