These two Carl Friedrich’s are easily confused as the lived at the same time with both eventually being the family senior.
Carl Friedrich von Bibra, of Höchheim later Bibra Line, was apparently born May 6, 1764. He became the Family Senior in 1826 and died April 11, 1832. He was the last Erbuntermarschalls of Würzburg as the German Reich dissolved. He seems to have been the center of the rearranging of property in the Bibra family. In the time frame of 1802 to 1816, he received all or part of Bibra upon the death of a cousin and sold Höchheim and part of Brennhausen to cousins. (See pages 162 and 163 of original family history and pages 28, 29, 219 of Martin Stingl book.)
Carl Friedrich Wilhelm Gottlob von Bibra is on page 220 of Stingl’s book.
Translation from German Wikipedia:
Carl Friedrich Wilhelm Gottlob von Bibra was already court squire of Duke Carl August von Sachsen-Weimar-Eisenach in 1788  . While he was still a student he was appointed government assessor by him, but in February 1793 he entered the service of Duke Georg I of Saxe-Meiningen as a chamberlain and councilor ; there he was appointed President of the Chamber in 1816 and, in 1829, the Real Privy Council.
Due to the political developments at the time, his goods fell to Bavaria, shortly afterwards to the newly established Grand Duchy of Würzburg , as a result of an exchange of territory in 1808 Aroldshausen, Walldorf and Breuberg went to Sachsen-Meiningen, while Irmelshausen went back to Bavaria.
As the landowner of Gut Irmelshausen , which belonged to Bavaria, he was represented from 1819  to November 24, 1827 for the district of Untermainkreis in both the 1st and 2nd, 3rd and 4th Landtag ; in the 4th state parliament he represented the Lower Danube District .
As the successor to Edwin Friedrich Zobel von Giebelstadt and Darstadt (1796–1864)  , who was dismissed due to his appointment in the first chamber of the state assembly of the Grand Duchy of Baden , he came to the Chamber of Deputies on April 7, 1825.
On November 24, 1827, he was dismissed from the chamber because of his function as state marshal in the Duchy of Saxony-Meiningen  . His successor was Wilhelm Ernst von Truchseß (1781–1842). During his activity in the 1st state parliament, he was a member of the III. Committee for internal administration and in the 1st and 2nd Landtag member of the III. Committee on matters relating to the internal administration of the Reich that come to the Chamber.
In 1836 he retired.