The Lufthansa first class lounges/terminal were mid compared to United's business class lounge? I could understand that if you are in the Lufthansa Senator loun

The Lufthansa first class lounges/terminal were mid compared to United's business class lounge? I could understand that if you are in the Lufthansa Senator lounges, those are the business class and star alliance lounges. What made the United's business class lounge better than something like the first class terminal at FRA and directly being dropped off at your plane?