What a great concept (and execution!). This really required a bold use of contrast to pull off the feel of this time of day and you made it look awesome - just right, and interesting to look at. Also, thanks for creating something illustrating a very specific time of the natural day without involving Celestia or Luna - it turns out to be refreshing.
Yeah; the second hardest part was probably to get her to tone down the commentary. As a drill sergeant, she has few equals. As a supportive adviser, she needs a lot of work.
A lovely moment captured on the page there, Geo. I think you've managed to do a job with the characters and the background, especially the high-contrast moment of dawn. Well done and I hope that we see something like this in the show!
All alicorn are pegasi, not all pegasi are alicorns. Similarly all alicorns are unicorns and earth pony. They are all three races of pony, inheriting all their strength as well as having special power of their own: Twilight's being the channeler of the magic of friendship; Cadence's is able to spread love and harmony.
Its interesting to note though that Cadence didn't discover her love spells until after she became an alicorn. However in defeating a particular villian she had demonstrated a complete mastery of that aspect as well as all the attributes a princess should have, and so changed from a pegasus to an alicorn.