Travel, slightly older, has seen more Questions, sees more each day, has given more Answers, has a higher Answer proportion, and has more users than Movies & TV. Movies & TV however receives more visits each day.
Do the site analytics (only viewable by those with 25k+ rep) give any clues as to why this might be?
Or, since not many users may have access to these for both sites, are there any plausible theories why this might be so?
Magento I can understand is not really comparable – the number of Questions there somewhat surprises me – and it is must be predominantly "business" rather than "personal".
Travel I know is predominantly "personal" and I would expect Movies & TV to be also. There would seem to be a high component of choice in both (unlike say a DIY site) and I would expect language to be more of a barrier for Movies & TV than for Travel. Judging by the quality of English on Travel, I doubt many of our users would greatly enjoy what for them would be foreign language films and quite likely concerning a culture somewhat alien to them.
Travel by its nature has a world-wide catchment area. With so many films and TV programmes of note made in English, I would expect the main 'market' for Movies & TV to be English speaking nations.
Maybe different geographical distributions of users between the two sites would provide some clue. Or perhaps
visits/day differ significantly in their duration. English Language Learners:
seems to have progressed further and faster than Travel. Perhaps Movies & TV (about which I admit I know nothing) is getting a lot of support precisely because it is related to helping to improve English language skills. On culture though I would hope Travel can compete.
The point being whether, if Movies & TV are doing something better than Travel is, what that something might be and whether it might be a lesson for us.
Another perspective of sorts, from Winter Bash 2016:
users hats English Language Learners 1,033 3,253 **Travel** 1,006 3,318 Magento 944 2,844 Movies & TV 887 2,857