Don't know, haven't done it - but why don't you 'mount' the drive from the MP2008 to the MP2010 and set it as the system startup disk, under System Preferences - then see if it works. If not just reset your startup disk on (re)boot.
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ps
if you can't mount the PCIe SSD, make a bootable 'cloned' copy (with an app such as Carbon Copy Cloner) to a USB drive, attach that, set theMP2010 to boot to that disk - then see ...