It sounds like you have the balance a bit aft on both of those planes. The only time I have noted this was with planes that are a bit tail heavy. With tail heavy models you have to fly the plane all the way to the ground because they tend to go where they are pointed, in other words, pull up a bit and they are trying to climb. This can of course be a bit unsettling when on a landing approach and you flare right above the ground, only to have the plane pitch up a bit and stall then fall onto the deck hard.

You might try moving the balance a bit forward and see what happens, some use a bit of spoileron to kill some lift and help the sink rate, one or the other should help.