Your best bet is to study the details of each bag. Hit your major retail stores and look at the label, stitching, etc. If you can take pictures and then compare that to your bags.
Or find someone that sales bags and is sort of an expert. I know that I have ZERO knowledge in it. I was just stacking purses and other bags in a pile when my wife pulled 2 out and was like, these are so and so purses. I was like OK....and?
Only purse I know is Vera Bradley due to the amount of money my wife has spent buying them.