I've used both and I prefer Aromababy, especially the Barrier Balm, but Gaia is cheaper and much more widely available. Gaia does smell lovely but it can be a little overpowering sometimes for my liking.

If you go to the Gaia website it talks about their ingredients being certified organic but I don't believe the product as a whole is certified organic IYKWIM.

If you want a really really pure product I believe Miessence is very good and it's available on this website but it is more expensive again and I just can't afford it.