The Ukrainian War has resulted in several supply chain problems for nations with Russian or Soviet sourced equipment. This has resulted in several nations looking towards replacing them with NATO aircraft, the F-16 being a market favourite. Changing from one aircraft to the other is not a simple endeavour, as these two aircraft have been developed with different wars in mind. IDGA has had the privilege to interview one of the few pilots who have flown both types. In this piece Todd ‘Leif’ Ericson discusses the differences of the two aircraft from a training and flying perspective. An essential piece of reading for anyone interested in exploring markets with old Russian models and for aviators with interests in better understanding competitor aircraft.