Top pic is an old low bar squat. Ignoring the ankle mobility problems that bar is clearly over the middle of the foot.
Bottom pic is a recent high bar squat. It might be the angle, but it looks like the bar is on the heel.
I'm considering converting to strictly low bar or hybrid squats because I'm at the point where I think it is basically impossible for me to squat high bar effectively. Am I just seeing things that aren't there?