Brenda, I'm going to be honest: I don't love either pair of jeans on you. Personally, I don't love it when jeans seem to hug the underside of my butt cheeks to the point that I feel like they are highlighting the butt crack (I'm sorry if that sounds crass, but I couldn't think of a more delicate way to put it). I know this is somewhat of a personal preference, because I do see women wearing jeans like that and others seem to think it is fine. I feel like that's a bit what it looks like with the size 2s.
However, even though they appear too tight on the bottom of the butt, they also seem to bag out at the thighs, so the combination doesn't work. I could definitely imagine that they might stretch on your butt as you wear them, but if that happens they will just end up even bigger in the thighs. Additionally, it might be the angle of the photos, but they don't really look bootcut to me. Maybe it's because the thighs are baggy, but they seem to resemble the dreaded relaxed fit with the bigger cut thigh that tapers below the thigh--they actually give me a little of a mom jeans vibe.
The 4s definitely look too baggy, especially in the thigh. So if it were me, I would keep looking--you have a great figure and I think you could do a lot better.