The difference between them in terms of size is that the Intel® SSDSA2M080G2LE is 9.5mm while the other two are 7mm. The physical SATA connection is the same.
We recommend you checking with the system manufacturer for a list of validated SSD models.
Thanks! Actually took the plunge and bought the 120. Did the simple Win 7 image backup and restore method and worked perfectly . Couldn't believe it was do easy. Created a D: drive with the extra space and my problem is solved . New drive also smokes the old one speed wise.