Hotter Face
Plain and simple, your fairway wood face is hotter than your driver. Why? Because the USGA doesn’t test them. There’s a limit to the “hotness” or flexibility of a driver face called Characteristic Time (CT), but it’s the wild wild west when it comes to your 3 wood I guess. There is definitely a very good chance that you could buy a fairway wood at your local golf shop that has a hotter face than your driver, which simply means more ball speed.
Length Matters
There is no standard length on drivers as every manufacturer is different due to their test results during research and development. But the typical length of a driver on the market is around 45.5”. The average length of a 3 wood is 43”. The shorter the club, the more control you will have and a better chance at hitting the sweet spot consistently. Sure the longer club will be swung at a faster speed. That’s physics. But nothing travels like a well-struck ball on the screws and you have a higher percentage of that happening with a shorter shaft. In Bryson DeChambeau’s distance project he worked his butt off to try and dial in a 48” driver. He just never felt ready to put it into play due to the accuracy inconsistencies. So he scrapped the idea and decided his 46” went far enough and was more controllable.