It might be all the same, for all you know. The actual amount of coffee bean mass in a spoonful or cup can vary quite a bit, depending on grind, bean type, and darkness of roast.
True, with the caveat they all need to get close to 200 - 205F, which most older machines do just fine. if you can put 200F water onto coffee grounds, the rest is dictated by the coffee, water, and filter. The machine itself has very little bearing on the outcome.
Last time I had to buy a new pour over or drip machine ca.2010, I was finding that most American brand machines were no longer hitting those temperatures, with rumor or supposition being it was due to fear over litigation. Thank the McDonald's lawsuit, if you believe that, although there was plenty of temperature data being posted on various coffee forums proving it was indeed true. New buyers at that time were even complaining about the beloved Mr. Coffee, once the golden standard of cheap coffee machines, as their earlier versions legitimately made very good coffee.
The only good choices I was finding at that time were all European (e.g. Technivorm = $$$$) or commercial (e.g. Bunn). I ended up buying a Bunn A10, which was moderately expensive, something like 7x the $35'ish you'd pay for a Mr. Coffee at that time. But these things are made for restaurant use
Visit this site, so it hasn't had any issue with the 5000+ pots we've put through it, in the years since. Damn thing might outlive me.