Windows 7: Network file choppy with Media Center, not with Media Player

I'm rather confused right now. I have all my media files on a central PC and use Media Center to watch TV shows or movies on other network PCs. I use media browser to organize the files and it works perfectly except if it is a large file (1080p). With these files it's choppy when I play it in Windows Media Center. I figured I must not have a good enough network connection to play the 1080p files, but when I navigated directly to the network drive and accessed the file, it plays perfectly in Windows Media Player.

I then thought maybe Media Browser might be creating the issue, but if I go straight to the standard movies section of Windows Media Center, it's choppy from there as well.

Why would Windows Media Center have a hard time reading from the network drive and Windows Media Player work perfectly?