Well, if the screen isn't calibrated, it kinda doesn't matter which viewer they use
If you can get them to calibrate the screen, then use Bridge to view, they'll be sweet.
I added a Channel Mixer layer, with these settings:
Then I put the layer on "Multiply" blend mode, and inverted the mask to hide it.
Then painted on to the lashes gently with a 10% brush.
Now, are you sure you're using the same profile in both programs?
In ACR, go to the Camera Profile tab:
And see what it says the profile is. Eg mine says this:
What does yours say?