Glass for 27 inch Thunderbolt Display

[danhoo]

I recently acquired a 27 inch Thunderbolt (not Cinema) display that works fine, but the glass panel is badly cracked. I found I can buy replacement glass off ebay/Amazon, but there's two part #s: 922-9919 for the glass for a Thunderbolt display, and 922-9344 for a Cinema display.

The parts look identical, and the Cinema display part is generally cheaper. Does it matter which one I use? Is there an actual difference, when it comes to the display glass (magnets are in a different place?)?

Thanks in advance.