You can see a big difference in an image on different computers if you don't calibrate your monitors.
When you open an image in ACR using Adobe RGB color space, make whatever adjustments you feel are necessary.
Everything you do in ACR is non destructive and 100% reversible.
When you then send that image to PS it should look identical to how it looked in ACR on that same computer, assuming your settings are right.
I've already told you those settings.
If your positive your color settings are right and you still see a difference try resetting PS and then go back and enter the settings again.
To Reset Photoshop:
Start Photoshop and immediately hold down Ctrl+Alt+Shift (Windows)
or Command+Option+Shift (Mac OS X).
Then, click Yes to the message, "Delete the Adobe Photoshop Settings file?"
Photoshop, I explained how all already in message #8, Proof Colors.
