Digital power coverage does not match, watt by watt, analog coverage.
WSTW is a 47,100 watt signal. WCBS-FM is a 6,700 watt signal. Both have the same HD signal equivalency.
WJBR and WCBS-FM are both Class B FMs, with the lower WCBS-FM analog power and height combination being the equivalent of that of WJBR. WJBR is not a "Flame Thrower" as it is a fully conforming Class B, just like CBS-FM.
FM stations on VHF frequencies can use, per their class, lower power and higher antenna height. The standard for a Class B is 50 kw at 500 feet. Stations that want higher antennas reduce power but generally have identical coverage areas.