I have both SSDs in my laptop (356 830 and 256MB M4). There is no difference in real-life speed between the 2. The Samsung toolbox is handy to get your windows settings optimized for an SSD. I installed it once for that reason, and to also check the general health of the Samsung, before I uninstalled it. It's a shame that the M4 does not have it's own software. So I have to give a slight nod to samsung for that reason if they are the same price.