What is the difference between GO29 and GO55 ?

go55Announced (April 20), the Go5G and Go5G Plus offerings cost $5 more than T-Mobile's current Magenta and Magenta Max unlimited plans. The bgest difference is that latest plansClass overview; Name: GO 55: Builders: Cantiere Navale Giacalone Mazara del Vallo (): Operators Italian Navy In commission: 1996: Planned: 3: Building: 3: Completed