P47 = 8 guns, no bombs, no questions.
I do a fair amount of bombing. The P-38 is no doubt a super air base and vehicle base"Attack" plane if you minimize the number of passes. Two passes in the P-38 is about it without losing an engine is average. The P-47 on the other hand, can take three passes on average. The numbers are rounded off and in that rule of the thumb range. If I were to be a bit more accurate I would say the P-38 passes without damage would be 1.5 and the P-47 2.
Two P-47s can take down three hangers, ords bunkers and radar on a small field with the addition of the belly 500 pounder.
The P-38 of the two is the better gv attack plane in my opinion because you can do a high clover leaf fully loaded so easy.