I adopted my civil Trangia for use with gas burner some years ago.
A bought a complete secondhand Trangia set for £ 5 and bought the Trangia gas burner at a sale for £ 32.
Many professional hiking experts consider the Trangia as cheap, heavy, big and without finesse (A description also valid for me when I come to think about it...).
I find it to be faultless for the kind of touring and cooking that I do.
I'm not a fan of the non stick pans, since I have managed to ruin a set.
The original Trangia gas burner works just fine, I never had any issues with it.
However simmering takes some time to learn how to do, as it's difficult to adjust the flame accordingly.
The copy burner that you found is unknown to me, so I can not give you any feedback on that one.