Yes, the differences in the capabilities of US airpower in 1967/68 compared to the French in 1953/54 are phenomenal. All of the US air arms were able to deliver an incredible amount of firepower with excellent accuracy to support the Marine garrison. B-52 strikes within a mile or so of the perimeter and smaller fast movers dropping stuff "danger close" to friendlies. What was tried in Normandy by both the RAF and USAAF to have heavy bombers achieve was achieved at Khe Sanh.
As far as intel goes, you can gather the best in the world, but when and how it is analyzed, interpreted, distributed, and acted upon will always be the weak spot. That is the most human portion of the process.
There is always that classic Monogram/Revell B-52 kit... too bad I don't build 1/72 anymore. I always liked the look of the NMF over black early Arc Light bombers.