Of course it would favour sendmail, since sendmail ships with FreeBSD.
However, unless you are going to take the time to learn all the funky 2-letter codes that sendmail uses in the config file, or are going to take the time to learn all the funky m4 macros that "make configuring sendmail simpler", then it's not worth trying to use sendmail.
Back in the day, sendmail was great. Now, there are much nicer, simpler, easier-to-use alternatives.