I thought I'd compare these two because of how they stick to the one main plot for the entire season instead of two completely different ones like seasons 3, 4, and 5. I didn't include season 1 because we all know it would win by a landslide. Anyway, both are amazing seasons but these are the reasons why I think season 6 is better.

Two Regina's
We finally get the Black Fairy
Two Regina's
Zelena is in this season
Two Regina's
The Evil Queen gets with Wish Realm Robin
Two Regina's
Aladdin and Jasmine appear
Two Regina's
Zelena and Regina's relationship
Two Regina's
Emma's savior identity/therapy storyline
Two Regina's
Ariel appears
Two Regina's
It has the musical episode (Probably my favorite episode)
Two Regina's
No Greg Mendell
Two Regina's
Regina gets more lines to show off her sass
Two Regina's
We get Zelena's sass
Two Regina's
It had a lot of the same feel as season 1
Two Regina's
Regina learns to love herself
Two Regina's
A small scene showing where Emma got her last name, Swan
Two Regina's
Snow White is acting like Snow White instead of Mary Margaret
Two Regina's
And did I mention that this season has TWO GLORIOUS REGINA'S?!?!?!?!?!?!?!?!?!?!

I like both. But tow Reginas = more interest xP

What can I say? Two Reginas!!!

It's a quality over quantity thing.

All Regina is quality Regina ;)