Understand, not taken as a "diss". The commission is the very same commission as all branches (of course, instead of United States Air Force, it says United States Coast Guard). On a side note, the Coast Guard's first agency was formed in 1790 (ok, part of it was formed in 1789, the same year at the Dept. of War). There are THREE commission types. Temporary, Reserve and Regular. As I understand it, other academies resulted in "Regular" commissions before, but no longer do.
So, the commission, which does not come from the Dept. of Defense, but instead the President of the United States, is the same, across the board. The status of those officers may differ from branch to branch.
And as a bonus, some CG trivia....
The United States Coast Guard traces it's history back to 1790 with the creation of the "System of Cutters", as proposed by Alexander Hamilton (the Father of the Coast Guard), and signed by President George Washington himself. At that time the Coast Guard was under the Department of the Treasury, collecting tariffs and combating smuggling for the fledgling country). As the Continental Navy was disbanded, for awhile, the U.S. Coast Guard was the only sea going service, and with the exception of the U.S. Postal Service, the only federal agency many Americans could see. A Coast Guard cutter fired the first naval shot of the Civil War, lost the highest percentage of servicemembers in WWI and landed troops in WWII. The Coast Guard has been involved in every U.S. war. In 1967, the Coast Guard was transfered from the Treasury to the Dept. of Transportation. In 2003 the Coast Guard was transfered from Transportation to the Department of Homeland Security (one of two agencies that made the move fully in tact, the other being the U.S. Secret Service).
That is where the Coast Guard finds itself now. And while it hasn't been transfered to Dept of Navy control since WWII, the Coast Guard conducted patrols off of Vietnam and can be found in the Persian Gulf today.
That was a good deal of trivia.