Which Cell Phone Carrier is best in specific locations?

If both Verizon and AT&T show on their maps that they provide full 4G-LTE service coverage in an area you plan on visiting, is there a way to tell which carrier provides the stronger coverage? We're going to snowbird in Mims, Florida and both Verizon and AT&T maps show the area is covered with 4G-LTE but I have no idea which carrier has the stronger signal. We need to buy a Hotspot plan and we don't want to buy from the carrier whose signal is weaker. I know that the number of connections makes a difference and there are other factors but having 3 bars of service is going to be better than 1 bar. Does anyone know if there is a website that shows better information than what the carrier websites themselves show? I'm not going to bother calling them because both with tell me theirs is better to try and get my business.