A-10 vs F-35 for CAS? I find it difficult to believe the a jet designed for speed and penetration in air to air combat would be as effective as the A-10. First the A-10 was designed to haul large amounts of ordnance and place it on target from close range. The F-35 does not carry as much nor as much variety. Most A-10 ordnance is dumb and cheap, which is fine from a low and slow platform knocking out many small positions. And it is plentiful with up to 11 hard points holding 11 bombs or rocket pods or other ordnance and sensors. The F-35's is fast and expensive which will cause howls of pain from the bean counters when a lot of it is expended in a small area to eliminate many small targets. But only up to 8 at a time. The F-35's cannon is smaller and carries a 10th the rounds. Armor anyone? The A-10 has it and was designed to take pot shots from the ground. Not so the F-35, who's skin is rated for stealth not rifle rounds.
With only a few aspects compared, the important ones I think, the A-10 wins hands down.
Love the A-10 by the way.