Kswap has dynamic fees and behaves like a liquidity pool with fee being in the range from -0.5% to 0.5%. So if there is low balance of Hive, users are more incentivized to provide HIVE liquidity and more discouraged to take HIVE liquidity.
Uswap now has fixed fee&reward. If there is low balance of Hive, users receive fixed 0.32% for providing Hive and pay 0.43% for taking Hive.