Part of it is case sensitive and part is case insensitive. From
3.2.3 URI Comparison
When comparing two URIs to decide if they match or not, a client SHOULD=
a case-sensitive octet-by-octet comparison of the entire URIs, with the=
=B7 A port that is empty or not given is equivalent to the default p=
for that URI-reference;
=B7 Comparisons of host names MUST be case-insensitive;
=B7 Comparisons of scheme names MUST be case-insensitive;
=B7 An empty abs_path is equivalent to an abs_path of =93/=94.
Characters other than those in the =93reserved=94 and =93unsafe=94 sets=
section 3.2) are equivalent to their =93"%" HEX HEX=94 encoding.
For example, the following three URIs are equivalent: