Both tools 'isolate' a subject, but they work very differently. Cropping keeps a rectangular region and drops everything outside it — background stays, just less of it. Removing the background produces a transparent cutout of the subject.
For product photos on white pages, Background Remover wins. For social crops, thumbnails, and framing, Crop Image is faster and lossless.
Background Remover uses an on-device ML model, so nothing uploads. Crop Image is pure pixel math and runs instantly.