The answer to 'difference between faucet installation' is that there are two main types of faucet installation: deck-mounted and wall-mounted. Deck-mounted faucets are installed directly into the sink or countertop, while wall-mounted faucets are installed on the wall above the sink. Deck-mounted faucets are generally easier to install and more common in residential settings, but wall-mounted faucets can provide a more modern, minimalist look and may be better suited for certain sink configurations. The choice between the two will depend on the homeowner's style preferences, the existing plumbing, and the layout of the bathroom or kitchen.
Deck-mounted faucets typically require less plumbing work and can be installed by a skilled DIYer, while wall-mounted faucets usually require more complex plumbing and are best installed by a professional plumber. The costs can vary depending on the specific faucet model, the complexity of the installation, and whether a professional is hired.