CBSE or ICSE - which is actually better?
Neither. That is not a diplomatic answer, it is the accurate one: the two boards are built to do different jobs, and the question that has a real answer is not "which board is better" but "which board suits this child, in this city, in this family's circumstances". A child who reads widely and enjoys writing will get more out of ICSE than the same child would out of CBSE. A child in a family that may be transferred to another city in three years is far better served by CBSE, for reasons that have nothing to do with academic quality.
Almost every page that ranks for this question picks a winner, because picking a winner makes for a cleaner article. The trouble is that most parents asking it are genuinely undecided, often with an admission deadline approaching, and an article that argues one side gives them nothing to weigh. So this one sets out what actually differs, where it stops mattering, and the three or four situations where the choice is genuinely clear-cut.
If you have already chosen and are looking for what the year ahead contains, the specifics are on our CBSE and ICSE pages, and year by year for primary on the Class 3 CBSE and Class 3 ICSE pages and their siblings.