Don't go with the obvious choice actually think about it

No offense, but what kind of question is that? Do you think that you are improving your "game" by asking you these types of questions?
Have you ever thought that the girl you rate a 8 I would rate a 7 and your HB 7 would be my HB 8. So which is harder to pull then?

It's all situational anyhow, you can have the tightest game on a HB6 and still won't pull if she's dedicated to her BF. You may also get lucky and stunble on a HB 9 that was just looking for a night of meaning less sex.

_________________
Drink me, make me feel real
Wet your beak in the stream
Game we're playing is life
Love is a two way dream

I agree with TheJ

For me the hotter a girl is the easier it is to talk to them giving the right situation because, they have more self confidence an better social skills most of the time. I approached HB5 and 6's before just to show my friends something an they're always shocked that a guy like me is speaking to em. They're at a lost for words; and I'm just like fuck this lol. I've tried but just can't seem to score a chick under a 7( really drunk nights ] they look at me like " what is it you really want" idk dude, jet go for the hottest of hot chicks anyway. Way more fun

Typically, the more hot the girls are, the more effect picking up skills have on them. I prefer going for 8+, because they have strong personalities and confidence, they know their stuffs and they give you challenges. I always have more fun gaming 8+ than others.
As for which one is harder, I would say the 7s, because they have low selfesteem, they will start doubting themselves, lost at word, nervous and in the end won't enjoy the whole attraction.

Really depends on the situation, man. I think maybe the 8 in most cases, they're more sure of themselves, so less likely to start over-analyzing a situation, and will relax easier around you.

_________________
Teach me.