Custom Laptops: mSATA or SATA SSD which one is better?

Hello friends,
A lot of custom notebook sellers like xoticpc give you the choice between an mSATA or SATA SSD. As iI dont know much about things but still I found the things on internet and read abut them and my brief Google search indicates both have the same performance.

Which one do you guys recommend? Are there other factors to be consider?

Hi,
I don't know if it matters much on laptops but current mSATA is limited to Sata II speeds if I recall correctly.

It comes down to personal choice but if it has both slots I'd opt for an SSD in the mSATA slot and a larger storage HDD in the SATA slot.