1 Tex. Admin. Code § 79.39
Without limiting the discretion of the Secretary of State to determine that a proposed name is the same as an existing name, entity names are considered the same and therefore not available if a comparison of the names reveals no differences or if the only difference between the proposed name and the existing names is one or more of the following conditions:
(1) The use of upper case or lower case letters, distinctive lettering or typeface, or the use of superscript or subscript letters or numerals.
(2) The addition, substitution, or omission of punctuation marks, accent marks, periods, spaces, or symbols that do not alter the name sufficiently to make the names distinguishable.
(3) Except as provided by §79.43 of this subchapter (relating to Alphabet Names), the addition, substitution, or omission of different articles or conjunctions.
(4) The repetition, absence, or difference in letters that does not alter the names sufficiently to make the names distinguishable.
Source Note:The provisions of this §79.39 adopted to be effective June 1, 2018, 43 TexReg 3341.