Why the Names Multiply
Because a format is cheap to re-skin and a name is cheap to register. An operator adding a timed draw to its lobby gets a new product page, a new search term and a new set of screenshots without changing anything about the engine. From a player's point of view the result is a menu that looks varied and behaves identically.
It also means guides written for one name usually apply to the others, which is worth knowing before paying for advice about a specific format.
The One Genuine Difference
Range. A draw with a hundred possible outcomes pays far more and lands far less often than one with ten, and the swings are correspondingly wider. That changes how a bankroll behaves and how a session feels, without changing the expected cost per rupee staked.
How coverage and payout interact is set out on the coverage page, and every guide is listed on the home page.