I like them both, so here let me help you decide
Are you trying to figure out which one is more "fun," which one adds more "pop" or "pizzazz" to your "wardrobe?" Then go for the Margiela. The shape is more distinctive and, well, it's sky blue.
Are you looking for a backup for something you already have or to restock your basics? Then it's all about the second one. Very basic shape and color. Good staple jacket.
So yeah-- second one is the practical choice. First one is the fun choice. Not saying you can't have fun with the second-- I certainly could. That's just the one thing that separates them. I hope that made things easier!