Are these genuinely really hard or is it just us? We are definitely seeing some inadequacies with our difference-finding skills. The beach might be the most difficult one yet. The first difference we found was on the main rock formation on the sand. In the first picture there's a poster stuck to it and in the second picture, it's not there.
The next thing you may have noticed is that the man walking alone near the rock formation in the first picture is not taking a stroll down the beach in the second image - he has completely disappeared. The toughest one was figuring out that where there was no mountain in the first image, one has suddenly grown out of nowhere in the second image. Still can't see it? Look way up the back, past the beach.