What sort of changes, if any, should you be looking to make 9 handed as opposed to 10 handed.

I guess the correct answer is maybe to play 10% looser, but I wonder how peoples % flops seen/pots raised/starting hand requirements change.
Does the value of hands like AQ/AJ/QQ change?

Also:

I have a VP$IP of:
14.93 over 9k hands on Tribeca (usually 9 handed games)
15.69 over 8k hands on Party (usually 10 handed games)

I must be a bad player!

On Party, when there's an empty seat, do you change your strategy? No. Play your cards and people the same. The great thing about NL is that you can play supertight 4 handed and all you need is one aggressive guy to steam on you because they know you're tight and they're trying to get you to lay down.

On the contrary, if you were more of an action guy, you could take a lot of average to above average pots from one weak-tight player in full ring. That's the beauty of NL. You can find 2 or 3 people to pick on in your own way.

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no quantifiable difference.