[treadlightly]

I have a Glo, and recently bought another Glo as a backup even though the Aura was only $20 more.

1 - The Glo seems to have a better contrast. I could not tell if one screen was whiter than the other by looking at them in the store. The Aura has a partial refresh which needs fewer screen refreshes to prevent ghosting than the Glo, but screen refreshes don't really bother me.

2 - The Aura is slightly smaller. The Glo is much more comfortable to hold. This is a big advantage in my books.

3 - The lights look similar to me. The Glo's light colour was originally a cooler blue, but they've since changed it to a warmer yellow just like the Aura.

Someone pointed out that the reverse text mode hack (where the background is dark and the text is white) is not available on the Aura.

I prefer the Glo to the Aura, so the extra money saved is just a bonus.