BSD md5 vs GNU md5sum output format?

Question

Any one knows why BSD md5 program produces hash output in this format ...

MD5 (checksum.md5) = 9eb7a54d24dbf6a2eb9f7ce7a1853cd0

... while GNU md5sum produces much more sensible format like this?

9eb7a54d24dbf6a2eb9f7ce7a1853cd0 checksum.md5

As far as I can tell, the md5sum format is much easier to parse and makes more sense. How do you do md5sum -check with md5? And what do the -p, -q, -r, -t, -x options mean? man md5 says nothing about those options! :|