EmuELEC whould be better.
You'd think so, but I've tried them all and find Batocera to be the most stable/complete/easy-to-use so far.
Really the only thing it's missing is an NDS core but I can probably hack one in if I feel like it.
But EmuELEC is coming along and I'll probably slap it on a spare 32GB card just to keep up with it.
I would disagree, I found EmuELEC to be the further advanced of the two. Not to say Batocera is bad, but I prefer the choices made in EmuELEC to Batocera. When i first started Batocera I found to many annoying little things that I felt I had to change...and more, and more, until i finally pulled the card and re-flashed it with RetroRoller. 
The nice thing is there's so much OS development going on for the thing, and it's going on in such a healthy fashion, that everyone's benefiting and improving.
I tried Retroroller and found it to be too demanding of my time to get configured. It's a complete blank slate that didn't even recognize any of my PSX .PBP files out-of-the-box. No straight-forward install instructions either. But it's new.
If you want total, complete control of *everything* while remaining as close to the reference Ubuntu image crashoverride created as possible and hacking in whatever you want, this is the image to get. But you gotta work for it, this one isn't for noobs, and you're going to be playing hard mode until it just "clicks" in your brain with how it's laid out.
Comments seen include a way to keep this one updated with .DEB install packages via SSH with future updates being more menu-like ala Batocera.
If you enjoy going through life on hard mode, then this is the image for you.
Batocera has most everything *but* Drastic and is easy to keep updated without reflashing. If one is a noob to Odroid and Linux, this is the one for you. It's OK and I've got a 256GB Samsung card dedicated to it on OGA #1.
If you're a lazy git or too damn busy with life to worry about configuring shit, this is the image for you.
EmuElec feels like a combo of both Batocera and Retroroller. I hated it at first until I figured it out and now I've got another 256GB Sandisk dedicated to it on OGA #2 and I'm almost finished getting the boxart/video assets loaded on it. Still need to figure out the Drastic menu access on it and get that assigned to a hotkey so I can quickly switch DS "screen" modes. this one is probably going to be my go-to. Unfortunately, updating it is currently...meh, but I hope they get batocera-like online updating rolled into it soon.
All three teams are very active over on the Odroid forums but be prepared to filter out the noob-noise from the team signal.
