I know all the branches pay equally upon enlistment, but what about commissioning? Is the starting pay the same for all branches?
Military pay is the same in all branches. Period. Depending on your duties, you may get other pay that corresponds to what you do or where you do it: sea duty pay, submarine duty, hazardous duty pay, combat pay, family separation allowance, cost of living allowance, etc.
Your choice for best answer is insulting. That answer should have been reported and removed. Enlisted Pay and Officer Pay is the same in all branches for each paygrade.
Weasel blows sailors for money
Why would you think that being an Officer would mean changes in the way pay is done? It is ALL THE SAME, whether Enlisted or Commissioned. If you are eligible for a pay or allowance you get it.