HunterWomen's Original Tall Rain Boot

Are they sure to the size? I am a 6.5, should I get a 6 or 7?

My wife wears 9.5us what size should I get her a 10 or 9

I usually wear an 8 do they run true to size? Are they form fitting, that's what I am looking for?

what is the difference between rain boots and snow boots they look the same