Step up to med 4th edition vs 3rd?

[itsnosolution]

Anyone have a preference between SU2M 3rd or 4th edition?

 

[iBS1972]

There's really not going to be much of a difference. If you like saving money, just get the previous edition.
It's better to just do Uworld questions and then reference or google anything you don't understand.
I highly highly doubt you'll score any more points from the difference between 4th edition vs. 3rd edition.