Congrats! You've chosen and bought a home. But do you know what kind of household yours is going to be? Narrowing down your power-tool brand of choice may be your next big decision. Two of the top name-brands, DeWalt and Ryobi, provide a place to start. Both are industry juggernauts, and both produce hundreds of solid products that work with the brands' base batteries, but they are not interchangeable. A house divided by DeWalt and Ryobi cannot stand.