[SATLUG] Xen Image vs Partition

[Sean I]

Does anyone have any experience with file backed xen servers vs
partition backed xen images?  Or does anyone have any good links to
comparison testing (I have googled and read a bunch I was just curious
with personal experience).  We are debating which to go with for our
testing environment, File backed would be so much easier to clone but
if the performance suffers greatly they will not be worth it.
Personal experiences would be greatly appreciated.

Thanks,

Sean