The Stampe is an absolule delight to fly, I owned a Renault engined one for ten years, but although the engine is smoother running than the Gipsy, it is an pig to maintain as new spares do not exist unless you have them made. If I won the lottery I would definately have another. I have not flown the Jungman, but have flown the Yungmeister (sorry if the spelling is wrong) and although it flew beautifully, and build quality superb, it seemed a tad underpowered, however I owned a Pitts at the time so I was probably expecting too much. As has been said before, you can't beat the Pitts for fun/buck. To answer your question, I would go for the Gipsy Stampe. It is a genuine two up aerobatic machine. Have fun.