How are you liking the calf one? I just ordered the mini lady bag in blush from Ssense and can't wait to feel the leather. I've only gotten veg tanned for my other MG bags.
I really like it! It doesn't quite hold the structure the same as the veg tanned ones (noting mine are still new) but it's not like it is crazy slouchy or anything like that. It's still a relatively structured bag and I don't feel like the look of the bag is compromised at all.
I guess a good example is from when I was taking that photo. The two veg tanned bags didn't need any filler in them to stand up perfectly straight, but the calf skin just looked a little better with some filler at the bottom. It didn't slouch like a balenciaga city or anything like that! The bottom just bent a little and it didn't stand up quite so perfectly. It's hard to see in the photo - there is a subtle difference in the way they're standing there though.
I store all my bags with filler (I use a dustbag from a smaller bag and put in that plastic inflatable void filler stuff or, if I'm out, crumpled up tissue paper) - the veg tanned ones don't strictly need it (right now at least) but I feel like the calf one does.
It works really well for me for the way I wear that particular bag - I use the top handle over my shoulder so the bag sits under my arm where something a bit softer seems to work better. I'm not sure I'd love the calf in the bucket bag, but I think it works well in the lady bags.
Oh, I think the leather feels thicker than the veg tanned too.
Hope that helps!