Different results between express.adobe.com automatic background removal and Desktop Photoshop

Hi,

I have tons of images I want to remove the backgrounds from which is why automation is key. The desktop Photoshop client provides the quick action remove background which does a subpar job (it misses a lot of areas around the subject) compared to the results of https://express.adobe.com/sp/tools/remove-background . Why is that? Shouldn't those 2 tools be quite similar when it even says "powered by Adobe Photoshop"? Is there a way to tune the desktop client tool to give similar results as the online one? Ideally I want to use the desktop client because of the batch-processing feature.

Thanks in advance