I've been choosing a delta kit between the linear rails, smooth rods or roller-carriages design - but that appears to be the last thing which may affect the print quality. First you should look on push-rod ball-joints play and equality of their length! Kossel is the cheapest solution - roller carriages, but they work quite well and easily upgradable to linear rails.So I concluded that in case of failure my money loss would be minimal with Kossel Mini.
In fact, after 3 days of assembly and software configuration I finally started the first 3D print in my life (end-stop mount): https://youtu.be/AuJ0LaVsB38
My 2-nd test print was more complex, also not bad: https://youtu.be/x0kJCxQ-pBs
1 star off for the problems with Marlin firmware provided on SD-card (not compillable, with some Chinese characters).
So I've searched for another firmware and transferred configuration settings from original (not a big deal for a software engineer professional, but could be an issue for others).