DeserializeJSON() does not treat the values "\u000B" and "\u000b" the same. Case sensitivity should not matter according to https://www.ietf.org/rfc/rfc4627.txt:
Any character may be escaped. If the character is in the Basic Multilingual Plane (U+0000 through U+FFFF), then it may be represented as a six-character sequence: a reverse solidus, followed by the lowercase letter u, followed by four hexadecimal digits that encode the character's code point. The hexadecimal letters A though F can be upper or lowercase. So, for example, a string containing only a single reverse solidus character may be represented as "\u005C".