The 110G-2 is the most awesome direct ground attack plane the game has in terms of raw power. The Mossi is a wee bit faster and more agile, and a skilled Mossie pilot can do %90 as much damage to a town as the 110 with proper bombing lanes and ordnance delivery, it has to take a back seat in terms of total damage deliverable (vs a town or OBJ's). I figured up the total amount of damage each aircraft could deliver once upon a time, and from memory the 110 was 7000lbs+, and the Mossie was 5000lbs+ in their best air to ground configuration. I just might go re-figure that again....
The only real advantage the Mossie has in the attack mode is its ability to carry 4/500lb bombs, that can equate into 4 dead tanks. The 110 can get 2 tanks with the 2/250kg or 2/500kg bombs from under the fuselage, with a possibility of 3 tanks if the pilot is accurate enough with the 4/50kg bombs form the wings. The guns are a moot point because they wont destroy a tank, but do have the ability to track it. I do not recall ever disabling a tank engine with 20mm or 30mm cannons. With that said, I have taken out the engine of a tank with the 37mm HE from a P-39 and 8/.50's from a P47D-40.