Since both platforms are not the same, so is there rules, binance may have reduced their APR payment percentage while the other exchange still mentain same old percentage payment,  sometimes those rule that are in their term and conditions give them some right to reduce the payme to without consulting or information the investors who have staked they money.

Any ways you can decide to endur till the end of the staking period a d there after move you money to the other exchange that have higher payments.