My appologies if this has been posted somewhere already. I use a 901 and 801 and have noticed that the same liquid can taste different depending on which device I'm using. Take RY4 because it's a big favorite. With me, RY4 seems a little more bold or defined tasting in a 901 than it does in a 801. I have no idea why. I find the same with other liquid as well. Does anyone else notice this and have any idea what may be the cause?