If you look at the promotion material from Microsoft, it seems that the really hot stuff - Availability Groups and Columnstore indexes - are only in Enterprise.
However, what really is a the major improvement is in all edition, to wit the window functions that permits you write expressions for running sums easily and efficiently. Nor should we forget try_convert and try_cast which are small things that are extremely valueable for a programmer.
[font="Times New Roman"]Erland Sommarskog, SQL Server MVP, www.sommarskog.se[/font]