Does the player who lands the killing blow on a monster get more experience than the surrounding players? Or does it get shared equally with everyone?

In a game of (4):

The primary player doing the killing seemed to marginally be getting more experience than the other 3.
The other 3 managed to retain the same experience since they leeched.

I.e.: P1 received 430 exp
P2, P3 and P4 received 300 exp

Just a rough idea, but in perspective (as of now), P1 is Level 5, P2 through P4 is Level 3 right now.

https://www.theamazonbasin.com/wiki/index.php/Experience

no. the experience is weighted by the character levels though, so the higher your level the higher your fraction of the total experience

yup, I've been leveling two chars at the same time and they got the exactly same exp no matter which kills more.