One reason Verizon is moving early on 5G is they need to have people think they are by far the best. Their entire business model is based on people paying more because they believe Verizon is superior. That's no longer true; AT&T and T-Mobile are so close to Verizon in quality most people wouldn't notice the difference. Jennie has T-Mobile here in New York, a hard city to service. She's not seeing any problems.
The chart at the left from Open Signal shows T-Mobile running faster in several parts of the country. They've hired Kevin Fitchard to blog for them. He's doing excellent work, as he did at GigaOm. Verizon of course has data from another source saying they are better.
My guess is that Verizon is slightly better, especially in the most rural 5% of the country.
But if you don't spend a great deal of time in rural areas, the difference is insignificant.
Meanwhile, Verizon is flooding television with obnoxious ads saying, "We're the best." They base that on a single source that isn't transparent. Their claim may be seriously out of date. T-Mobile's testing since Verizon went "unlimited" shows speeds falling 14%. It's just confusing people, especially as T-Mobile has billboards in New York claiming a faster speed.
When someone like Verizon repeats "trust me" incessantly, with minimal evidence, only a fool would believe them,