The overall brightness was better in the first one, in my opinion.
I agree there. Also I feel the brightness is a little bit too uniform over the dayside -- if you can have the intensity drop off a little bit as you go from the full-lit areas to the terminator, I think that would help get a more photo-realistic effect. I also notice what seems to be a very narrow atmospheric highlight/haze across the sunlit limb, which if expanded out a bit might help in that regard, too.
As for everything else, I really like your landmass shapes, distribution, and texture. The polar regions especially look great. The surface colors are a bit vivid in my opinion, but the variety and detail are good. All in all this is fantastic for a first planet. Keep it up!

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On an unrelated note, I played around a bit with making more "realistic" atmospheres in GIMP, especially with trying to mimic the way that colors change from the day to night side, and the "haze" effect near the limb. Here's what I got when trying to reproduce the earth's atmosphere. There's some nasty banding going on that I need to fix, but at least it shouldn't be too noticible when actually placed ontop of a planet.

Edit: Placed over earth-surface to demonstrate:
