This was made with Photoshop for a competition known as “photoshop battle” created by benny productions known as a youtube channel.
I think you can’t see the difference, as the human is only made with gimp for working in photoshop. But the difference is in details and color and highlights which feel a bit lower quality, the gimp part looks dull-colored when printed on a paper. And it also has less contrast and highlights which is un-noticeable at all if you just see the image not examine it.
It’s very hard to spot differences because the human was created with gimp and background and grass with photoshop, but there is a mistake in the photoshop section, I’ll send an Easter basket* to the first person who finds it.