Actually guys, dissimilar dueling is very beneficial. 40 years ago, the Navy discovered that dissimilar dogfighting is a valuable tool and they employed it as the basis for Top Gun training.
When dueling in different aircraft, each pilot must adapt and learn to fight to the strengths of his particular aircraft. This creates interesting fights. However, you need to have specific rule agreements in place or it can deteriorate into the old "HO and run" scenario pretty quick.
On alternating Thursdays, we have a 3 v1 event in the TA. Every pilot gets to pick his ride. You get some interesting and often challenging match-ups. Moreover, it does build SA skills by fighting three at once.
BaldEagl, the DA is not the best place for dissimilar dueling, unless you bring a squad in and split it up by fighter type. Dueling builds ACM skills. Dissimilar duels build skills as well. Both will improve your MA result. Multiple enemy dueling (2v1, 3v1 and so on) is a great help for improving your SA and developing skills, such as accurately estimating E states, determining the greatest threat and the like. A regular combination of same plane, dissimilar plane and multiple enemies dueling will provide balanced practice for improved MA performance. But, you should start with same plane, individual duels to sharpen or build your ACM skills, as this is base upon which all else is built.
My regards,
Widewing