Unfortunately, no they are not. They have different LVDS/video data cables, among other things. The LVDS cable goes between the logic board and the LCD, allowing them to communicate. The pinouts of the 2 cables are different on these models. The mid 2009 15" Macbook Pro LCD is interchangeable with all LCDs available for the 15" Macbook Pro LCD from late 2008 thru early 2011 for sure and may be compatible with those after that.
You can verify the compatibility of the 2 LVDS/video data cables by following these 2 links.
MacBook Pro 15" (Models A1226/A1260) Display Data Cable
MacBook Pro 15" Unibody LVDS Display Cable