There is a huge variance in US cleaning machines. Your question is rather like asking if a car is faster than a bike.
As @whart has noted, US results depend on frequency, power, temperature, spacing, surfactant, and rinse. It’s only when you get careful with all of the above that your results approach optimal.
The first question to ask is how much you can trust your US bath to meet spec. If it’s medical equipment from Germany, you can trust it a bit more than flimsy-consumer easy-to-use from anywhere.
There are threads on this topic which you might want to examine. A high class expert on cleaning technology, whose handle escapes me, contributed to one thread and refined my own cleaning process, for which I am considerably grateful.
I use an Elma US machine from Germany, and doubt very much that my records are less clean than anybody's.
As @whart has noted, US results depend on frequency, power, temperature, spacing, surfactant, and rinse. It’s only when you get careful with all of the above that your results approach optimal.
The first question to ask is how much you can trust your US bath to meet spec. If it’s medical equipment from Germany, you can trust it a bit more than flimsy-consumer easy-to-use from anywhere.
There are threads on this topic which you might want to examine. A high class expert on cleaning technology, whose handle escapes me, contributed to one thread and refined my own cleaning process, for which I am considerably grateful.
I use an Elma US machine from Germany, and doubt very much that my records are less clean than anybody's.