An RDA vape tank differs from a normal vape tank in that it only has a small e-juice well, allowing you to drip a small amount at a time. As a result of this design, you can quickly switch between flavours. RDAs are also common in the vaping community because of their ability to emit large volumes of vapour, which makes them ideal for cloud chasers. Finally, since you'll be designing and mounting your own coils with an RDA, you'll have a lot of flexibility to configure your device.