It's not always the case that the US forces have superior kit, though. In the 70s and 80s 21/23 had a regular summer time exchange trip with with US forces. I went to FL in 1985 as part of a composite squadron to work with a Texas NG Ranger regt.
Not only were they hopelessly unfit and devoid of any forward recce skills, they had useless radio kit/skills too. They were totally unable to use the HF kit they had, which was only any use up to 50 km. At the time we were very successfully (when deployed in role) working from the IGB back to S England (1000 km) using what was then quite new HF burst kit.
The only thing of theirs we wanted was the M203 - the M16 with the underslung grenade launcher. They thought our AR15s were a bit old, though.