There are very few differences between prep/entertainment faucets and lavatory faucets. The main difference is prep/entertainment faucets do not have a pop-up waste drain therefore a drain with a separate mechanical control will need to be purchased. The most important thing to keep in mind when considering a prep/entertainment faucet for the bathroom is the spout length. The water must come out of the spout directly over the drain to prevent water from splashing out of the sink. If the spout is too long for standard installation, your contractor may be able to install the faucet farther back in the cabinet to offset the extra spout length.