The first picture is pretty clearly AI, judging by the number of nonsensical stuff going on. The girl has 3 ears, the pauldron pattern makes no sense, there's something really off going with her right leg and her hand, the fur on her left thigh merges with her hair, there's a weirdly shaped building to the left just floating in the air, needlessly following the shape of the archway, which itself is kinda overly curved.
The second picture is... effing good AI. But there still are giveaways. Things that a human artist, especially of this level of skill, would have zero reason to mess up. First issue which even told me to look for more is that the stripes on her panties are of uneven width. The picture on the upper left is needlessly curved. On the upper right, there's a detail which looks like a sunbeam, but it's above the window. And the girl herself, she has 4 ears if you look closely enough. Her antlers appear messed up, as if they weren't correctly "flipped" upside down. And there's a mistake on her left hip, it juts out too much too high, not keeping the symmetry with the right side.
These days, I'm also always wary if there's no artist signature. Not a dead giveaway by any means but I've seen enough to get me suspicious right away when it happens.
