These BitGrin coins are height locked and only unlocked once per month at 20k coins each time. This means the dev team always has 10% or less of the circulating supply, and rewards ongoing development and health of the coin by incentivizing the developers to continue well after the initial launch. Kepler on the other hand will have 100% of the circulating supply now, 50% of the circulating supply in a month, and so on. This is far too much and creates a terrible economy for a currency. There incentive will be to sell as many coins as possible, as quickly as possible, and then discontinue work.

Also: it looks like they have been shadow premining for 12 days: https://github.com/keplernetwork/kepler/commit/368bb2690389e0a9825ce2a1485dbb3e833d1732