First off, I believe that Intel has its memory far more "unified". AMD typically has a stricter VRAM/RAM 'tradeoff' setting that does not exist on Intel in the same way to my knowledge. (See how on Strix Halo systems, there is a thing about "allocating" 96 GB to the GPU, which seems to be needed sometimes but prevents the CPU from accessing that memory.)
Secondly, the Panther Lake board has LPDDR5X LPCAMM2 memory at 7467 MT/s, while the AMD boards are stuck with DDR5 SODIMMs at a meagre 5600 MT/s. In other words, the Intel board gets a third more memory bandwidth!