Yes, but why? They are different sizes, 40GB and 80 or 160GB. The bigger one will have unRAIDed space, which you may or may not be able to use separately from the RAID volume, depending on what RAID controller or software you are using.
i remember reading something about how trim doesnt get passed on to ssd in raid yet, so ssd raid is faster, but only after a few months after a fresh format and install.