I dont often see cards of different colors and rarities compared, partially because its just so much information to fit into one article, but I think its really useful to see how they fit together to have a better idea of how to look at a pack as a whole
3 Cartas Promocionales de Moltres, Zapdos y Articuno
You can learn more about everything included in boosters with Product Architect Mike Turian's Collecting Innistrad: Crimson Vow article, and be sure to see all the delightful card frames themselves in Clayton Kroh's Booster Fun article
When you buy physical booster packs from the local game store, you could open a chase card or ultra-rare variant foil that can be worth more than what you paid for it
The other (and arguably much bigger) difference is your window of opportunity
Black offers Bloodthirsty Aerialist as a backup Ajani's Pridemate along with Oath of Kaya as a Lightning Helix, while some sort of Green-White Explore shell with Wildgrowth Walker might actually be the quickest way to turn Serra Ascendant into a massive flying threat