When does a compact hydrogen machine beat a premium high output one?

I'm one person, using it at home, and I'm stuck between two ends of the market.
 
The Hydro Heal HH300 is listed at $3,500 and 13 lb. The premium unit I'm comparing it with is $7,499.99, around 30 lb, up to 1,800 ml/min, with dual user ports and a 10 year warranty. The cheaper one is easier to move and half the price, but its output, purity and warranty details aren't documented anywhere near as well.

Which use case makes each of those trade offs?