The USA uses the same "blocks" based definition for flight time as Europe (although the UK military, at-least, uses a different definition - they use take-off to landing).
Another advantage of using an electronic logbook is that you can have it adapt for multiple regimes. So, for example I hold both EASA and FAA licences, and some things are totalled differently or different pieces of information are needed (e.g. FAA care about cross-country time and have a formal definition for it, whilst EASA now want time IFR; alternately if I, say, fly an X'Air - to the Americans that's an aeroplane, whilst to the Europeans that's a microlight and not included in certain totals columns). When I wrote my Excel based logbook, I set it up to provide separate totals for EASA and FAA logging purposes.
As a paper logbook, I've been using a Pooleys (Airtour when I bought it!) standard commercial logbook, which neither the UK/European, nor American powers that be have ever had any problems with.
G