TrueType font rendering

Hi!
About TrueType font rendering on XFree86 4.2.1, I've read there are two ways
to do it:

    1. with freetype extension in XF86Config and making fonts.dir file with
ttmkfontdir;
    2. using a Font Server. I've found two servers: xfstt and xfs
(integrated on XFree86).

There are differences using first method instead of second? Which is the
best way to do font rendering?
Which is the best font server? xfstt or xfs?

Thanks!!

Alex