I'm happy to justify my comments - and yes I have flown in British snowstorms and Florida thunderstorms so this isn't just banter.
The USA's weather systems are far larger and more predictable, the sudden changes in cloud, fog, precipitation, etc that often catch people out in the UK don't happen in the same way.
The UK often uses overhead joins at smaller airfields, which are almost unheard of in the USA.
Normal circuit radio calls are different in the UK - it is highly unlikely you'd be asked to call base or crosswind unless joining there, and the american "upwind" is called "deadside".
There is no automated weather briefing system at most UK airfields.
Rules on use of transponders are different in the UK.
Terrain clearance rules are different in the UK.
The rules on class D airspace are different in the UK.
The US doesn't operate the British FIS or RIS services, and has no such thing as LARS.
British weather forecasts are presented differently.
The US doesn't have Military Air Traffic Zones (MATZ).
The UK doesn't have automated runway lighting.
If you squawk 1200 in the USA that's "VFR own navigation", in the UK it's "autonomous fighter operations". The difference could be important.
Well, that's the differences that I can think of in 2 minutes, anybody care to add anything?
G