I7

Kobra X's major speed advantages come from multi-color prints specifically, its time to switch filament is way less and said switch produces less waste So yeah... If you have a single colour print you obviously won't see those time savings. It sounds to me like you only read a few youtube titles and

The SparkX i7 is worse then the Creality Hi in every way except maybe waste, a couple reviews I’ve watched show it having terrible print quality compared to the a1.

I didn't have it for long, but it jammed, failed to retract, and chewed up filament more than any other filament management system I've ever seen. I think the SparkX i7 AMS is also bad (in that it will unspool your filaments) but I legitimately think that the Qidi box is the worst one on the market

У меня есть creality space pi X4 и я выбрал anycubic cobra x, они замечательно работают вместе, а creality sparkx i7 со своей коробкой плохо, особенно когда катушки целые, нить запутывается и сушить не умеет

I just got a SparkX i7 and that's supposed to poop less and it still poops a ton on multi color. If you have the cash a U1 is a good idea but I'm personally waiting for multi toolhead printers to be a few consumer generations in, not first gen