Originally Posted by
Jobza Guddun
td may have meant the difference between an F-5B/F and a T-38 rather than the single-seater.
F-5's most visual difference is the LERX. Also F5s are equiped with AN/APQ-159 Radar, RWR, Chaff dispenser and can carry and fire real armament (ignoring the small number of AT-38s and those used at Edwards for weapon system trials) .
They've lasted well considering I first saw some of these same airframes at Alconbury with the 527th TFTAS 40 + years ago, still love the 'Aggressor' schemes.