Different amount for gold when recharge in-game compared to using the website

EmpressPan

Hi there I hope the mod can clarify on this matter. There's a differences for the amount of gold when you recharge in-game compare to from website. In website it shows;
16point for 170gold
60point for 670gold
200point for 2350gold
400point for 4900gold

but in-game it shows as below;

16point for 168gold
60point for 660gold
200point for 2300gold
400point for 4800gold

Please clarify if we do get more by exchanging the points from the website compared to in-game as I've been exchanging the points using in-game... if this is true then it means we are losing the golds.