FM transmission is inherently limited, for the overwhelming most part, to “line of sight”. The antenna has to be able to visually “see” the transmission source. So boosters, etc; all other things being equal, will likely provide little benefit. AM radio can bounce off buildings, the ionosphere, mountains, FM doesn’t. Certainly, a higher quality FM antenna will provide some benefit, but NONE if it isn’t LOS with the transmitter. You pretty much to raise the height of your antenna.
My 50-foot TV tower brought in Tampa FM stations from Sebring, FL. That's a 90-mile distance, and they sounded like right next door.