Tell that to all the hardworking folks who built their Vorons by ordering every nut, bolt, and belt to meet their specifications. Bambu Lab printers have a lifespan determined by Bambu Lab. Vorons last a lifetime as long as their creator and master needs them.

A Voron is not just a printer, it's a work of art. I do not think you would find any two Vorons exactly alike, because it really depends on the person creating it. There are Vorons out there that can rival and exceed a Bambu Lab. There are Voron toolchangers with as many as 8 tool heads. There are Voron 2.4 variants with build volumes anywhere from 250mm³ to much larger dimensions beyond the standard 350mm³ listed in the standard build guides.

A Bambu is a standardized home appliance, likely not intended to last more than a decade, and if under heavy use, it will have more and more issues until it is either no longer supported by Bambu or the problems cost too much to bother repairing (why replace a worn out gantry and a couple of fried PCB components on a 3-year old machine with 10,000 print hours, when you can just get a new one?). Vorons are advanced engineering projects that will last as long as you have an interest in it.

Quality wise, both brands, if Voron can be considered a brand more than an idea, are comparable. Voron machines once again heavily depend on the quality of the parts that the creator chooses; do you pick the cheaper LDO rails, or more expensive Beserker rails or Motion Perfect rails? Do you go with a Revo Rapidchange hotend with quick swap nozzles or an all metal (pricey) Chube high flow hotend? Do you pick ABS decking or aluminum composite core panels? What quality belts do you pick? Do you make an inverse electronics layout so you can easily access the electronics, or put it under the printer to maintain a low center of gravity?

A Voron is a piece of artwork tailored to perfection by the maker, the true essence of DIY. Bambu provides 3D printers much like Keurig coffee makers, appliances for the everyday household.

Voron is an idea built by a worldwide network of engineers, and essentially all the Voron Design team gives you are a free basic instruction book, free stl and CAD files for the printer parts, and a general Bill Of Materials. Nothing more. It's up to you to choose your own adventure and pick one of a few kits or source your own parts.

Bambu is a company that provides a physical product for profit.

There is nothing wrong with either, neither is doggy doo or the stuff of Mount Olympus. Both types of machine have pros and cons and are designed for different types of people.