No, Xbox Series X has more bandwith for GPU tasks. Unless NBA uses more than 10GB for GPU tasks that is, which is very unlikely to happen ever. Especially in a cross gen game that runs with the same settings on Xbox Series S. The S console has 7,5GB RAM for games and Series X (10+3,5GB). With the exception of resolution difference and missing DoF there is no difference.
Why is it unlikely to happen ever? Simply put these consoles share their RAM pool between the complete APU. So some of the GB's will be used for audio, game logic, ... . The CPU wants some Christmas cookies, too.
Again, we don't actually know if this is entirely true, and it's not necessarily that straight forward as many have been discussing for months now.
Cross-post, but the bandwidth gains the Series X has versus the PS5 are potentially up for contention due to the way ram parallelism works and how the Series X's ram is set up.
Eg the Series X has 6 x 2GB sticks, and 4 x 1GB sticks, with only 10GB of the ram being higher bandwidth (achieved with 10 x 56 GB/s on the first 1GB of all 10 sticks), and 6GB being slower (achieved with 6x 56GB/s on half of the 2GB sticks).
However that doesn't necessarily tell the full picture, as access to the 4GB could mean the system has to wait for access to the 10GB at the higher speed (occupying the full bus whilst retrieving the data at the slower bandwidth), which in turn brings down the entire average.
In other words, potentially having to take turns to access the CPU (slower) and GPU (faster) ram, and not being able to access all of it at the advertised speeds, simultaneously, thus dropping the average bandwidth on the GPU side in real world terms.
That doesn't happen with the PS5 as there is no split ram use or speed difference in the way it's set up. In other words, we know for certain it can access GPU and CPU/System ram simultaneously (at the same speed). So given the entire context of the ram set up, its not really clear that the XSX does have the ram bandwidth advantage, especially if games do end up using more than 10GB for graphics.