SO I have had the Artsy Two as a matter a fact. The Artsy is a beautiful bag actually I like to call it a Sexy Bag but it is not practical at all - clearly just for looks. And if you are calling the longchamp heavy then you should think twice about the Artsy. And the Graceful I admit just sitting there looking at it - its okay but this bag needs stuff inside to see the full beauty. Here is my take below on both bags and yes I own the Graceful.
Artsy
Pros - Beautiful and well made
Cons - Heavy, not a shoulder bag and uncomfortable not a daily bag.
Graceful
Pros - Beautiful, light, easily thrown on shoulder, comfortable (long wear) and very practical for every day use
Cons - front tab concern and corners of bag down the line
To me the Graceful is a mixture of the Artsy and Delightful in one bag. If you have other bags to rotate then yeah maybe an Artsy is good to have but if this is going to be an every day bag I'd say not. I let my Artsy go because for me the bag was just not practical and was not being used enough to keep.
So Sexy not Practical Artsy all the way! Practical yet beautiful Graceful!