All keyboards allow you to adjust the dynamics (How it responds to the speed of attack applied) of the keyboard per layer (Upper 1, Upper 2 etc.), therefore if it is a light keyboard but you are heavy handed you adjust the dynamics to suit and vice versa. (The separate layers also mean you can have 2 different instruments on and still give them their individual expression with just one dynamic action)

NOTE: It is best to use the Piano as your baseline and adjust the dynamics around this. (You can also have some fun if you reverse the dynamics of 1 layer so that it gets quieter the harder you hit it)

Bill