I don't know...Can I really figure out the power on my own?

I have absolutely zero experience with reciever separates. I grew up on boom boxes, shelf systems and home theater in a boxes.

I can understand that more wattage will mean more volume, but my question really is - will the 100 watts be much less than 110? (yeah, yeah, I know, it's 10 watts less, dummy) Will I be pumping 100 watts through my system really ever, or would it be only during parties, at midnight, with no neighbors and 50 of my best friends?