That's because they are the same page. Notice in the upper left corner of either invocation, they probably both say fstab(5)
. I'd be kinda surprised if not, or maybe you have that man page installed in two locations - I seem to only have one fstab man page..
An example might help: Try the printf man pages:
man 1 printf
Above, both go to the same page; however:
is a different manpage, for a different printf (or, the same printf, but C programming related details).