E34 M5 3.6 or 3.8 ?

[dp400]

Can anyone tell me apart from the obvious difference in dispalcement, what are the main differences between a 3.6 and a 3.8? Are they both 6 pots and why do the 3.6's seem to be considerably cheaper than the 3.8's. Also does anyone have any experience in running a 3.6 every day that they would like to share with me.

Im looking for an everyday car and am having trouble making up my mind between an M5 3.6 or 3.8, or a E36 M3 3.0 or 3.2 Evo.

Any help appreciated.