Kobo Glo vs Kobo Touch

I've been looking at Kobo Touches, but I found (on Craigslist) a very nice, well priced Kobo Glo -- so I was wondering, how do the two compare? Is the Glo basically the Touch with front lighting? -- and does the Glo's screen look about like the Touch's when the light is turned off? If you could get a used Glo for about the same price as a used Touch, would you do it?

Thanks for any information.