Desk research against primary sources, with the issuing authority linked where a page states an official fee, rule or deadline.
Marina, JBR and JLT offer a similar package of density, metro access and walkable bars, so the choice between them often comes down to atmosphere and building age rather than anything structural — worth an evening out in each before deciding rather than judging from listings alone, since a floor plan tells you nothing about which one actually suits how you want to spend a weekend.
Business Bay and DIFC serve a different priority: a central location and proximity to work rather than a social strip on your doorstep, and DIFC's premium dining reflects the finance-sector crowd around it. Since all of these are more expensive than villa communities, treat the first-year cheque as the one to get right, because moving after a bad match costs more than the extra care taken up front.