I don't own either, but I've been lusting after the satchel for a couple of months now so I can post here right? :
I saw one in blue at my LYS the other day and it was surprisingly large. And beautiful. Upon quick inspection, it appeared to be well-made (of course, time will tell) and I like that it has the snap closure. The pockets are basic but sufficient. I've heard accounts that the bag tips over sometimes, but I would think it'd be fine if you stuffed it evenly and not front heavy.
I love the grape and even asked if my LYS can special order (they can), but I'm still waiting for the lightning to strike *sigh*