The Matelasse never took off like its motorcycle counterparts. So imo, it's not even apples to apples. Go with the twiggy, it's gorgeous and practical.
I voted for TWIGGY... I've never seen a Matelasse IRL before but then again when I ordered my cornflower TWIGGY - i didn't really know what to expect! BUT I totally the TWIGGY!!! It's a different shaped bag! It holds loads of stuff which is awesome and if its not filled to the rim (like mine) you can actually pop it on your shoulder! I dunno - theres just something about the shape that I like... GOOD LUCK on what ya decide!!!