You've got to get them in your hand.
I have big hands, but for me the Mili just offers a little wasted space; the PM2 fits like a glove.
On a fixed blade, I'd probably lean toward the larger handle. But for a knife that's going to ride in my pocket every day, I didn't care for the extra length.
I know others do NOT feel the same way.
Both offer plenty of blade for my daily use needs.
The Compression lock took me about 3 tries to get used to. Now, it's my favorite lock, and it takes me an extra second to close my liner- and frame-locks because I turn 'em over first.
I love that it's tough, takes little pressure to operate, and I don't need to pass a digit in front of the blade to close.
My pivot is loose enough that to close I gently squeeze the lockbar, and can use gravity for the rest, but tight enough not to woble or open inadvertantly.
The handle/blade/spydiehole dimensions are perfect for easy, smooth opening every time.
my 2 cents.
Good luck with your decision.