I don't disagree with your conclusion but the comparison of max bandwidth between the two SoCs is not enough. Neither of them will use all of that bandwidth doing AI work because the GPU will be compute limited. That's why dedicated GPUs perform so significantly better without having significantly higher bandwidth.
The question I answered was "Would Windows ARM performance be similar for those cpu?" and the answer is, no, because the RAM bandwidth for ARM SoC computers for Windows, primarily Snapdragon X1E and X2E is half to quarter that of the M1 Max.
Same thing applies. Neither CPU would be able to fully saturate the available memory bandwidth so comparing by bandwidth alone is not accurate.