Is it better to use 301 redirects to URLs with a trailing
/ to a URL without a trailing
/ or is it better to canonicalise one version?
canonical link type is not supported by all user agents, and even if a user agent supports the
canonical link type, it may decide to ignore it, so users would end up on the "wrong" URL.
So a 301 redirect is preferable.
This is also the recommendation of the
Before adding the canonical link relation, verification of the following is RECOMMENDED:
For HTTP, permanent HTTP redirects (Section 10.3.2 of [RFC2616]), the traditional strong indicator that a IRI's content has been permanently moved, could not be implemented in place of the canonical link relation.