There were a few Italian trials bikes made in the early 1980s that were similar in geometry and componentry to the last model Bultaco Sherpa Ts. Not surprising really because ex-Bultaco technical people designed them and the Bultaco was regarded as a very good design at the time.
The SWM trials bikes from the early 1980s are generally regarded as the best Italian trials bikes that had a Bultaco design influence. The Italjets were not so highly regarded at the time, but nowadays anything can be made to be as good as anything else, and people with the green Italian machines are nowadays able to enjoy riding something that looks a bit different to the more commonly seen Yamahas and Bultacos and be just as good to ride.
Fitting Yamaha wheels is not uncommon practice in twinshock trials circles