We're just going to briefly look over these two next generation drives. Both the Extreme and the M3 Pro use the 2.5" form factor so you'll not have a problem installing either in notebook. The Plextor does ship with a desktop adapter bracket for desktop use though.
Both drives have the proper mounting points on the bottom.
The Plextor uses a 7mm Z-height for next generation Intel Ultrabooks and the SanDisk uses a traditional 9mm height.
SATA power and data connectors are offset to the side where they should be.
This is why I built this page to begin with. The Plextor is on the right side and places the controller on the opposite side from the flash. The SanDisk divides the flash on each side of the PCB.
Both drives only use eight 24nm flash chips on the 240/256GB models. We have to wonder what the performance would be like with a full 16 chip spread.
Also the Plextor uses a 512MB cache buffer. SandForce controllers do not use external cache, one of the reasons why they generally cost less than many other drives with other controllers.