I would say the Bare Minerals Buxom mascara. I tried the dior show and hated it I felt it made my lashes dry and clumpy but did not have this issue at all with the Buxom mascara
Also, keep in mind the DiorShow is a powder formulation mascara. It can tend to be a bit drier and more powder/chalky like because that is how you are able to keep applying it to your lashes in so many layers. You can always use any other of your own favorite mascara and just use a lash primer underneath. These protect your lashes, nourish them with vitamins and oils that are great for conditioning the lashes and they give you instant lush and long lashes. I LOVE the Lancome Cils Booster!
Answered[ Edited ]
Diana has some awesome suggestions!
I also wanted to add some more mascaras that are great for volumizing and thickening and that are similar to the Dior Show.
Sephora Collection Atomic Volume Mascara ($15.00) USD
Clinique High Impact Mascara ($14.50 USD)
Urban Decay Lush Lash Mascara ($20.00 USD)