[Q]Update CM 10.2.1(grouper) to which CM 11 version on Nexus 7 2012 topic

Been meaning to update to CM 10.2.1 on my Nexus 7 tablet for a while now. Was a rank noob when I rooted & flashed it (using Skipsoft Unified Kit, all props to the dev!) so bear with me if I get a bit bogged down re technicalities.

It failed to install automatically in TWRP so I flashed the zip manually, and was successful. Now because it's been a pretty long time in between updates, 3 other CM11 updates have appeared...guessing the latest is the first one listed below. Do you have to progress through them in sequence to get to the latest? Also is there anything different about updating to a new version, ie from 10 to 11? Can I just use the auto updater in settings?

The 3 available

cm-11-20141112-SNAPSHOT-M12
cm-11-20140916-SNAPSHOT-M10
cm-11-20140804-SNAPSHOT-M9

Thanks for any opinions etc :)