Three companies, who has the best specs for a new pool?

[hjks]

three in ground pool companies. company 1 ) steel structure
with 1/2 inch and (4) 1/2 inch steel box
beam 10" center , 5" on stress. They use a company called Prestige Gunite. They do a 6 sack mix.
Company 2 ) 12" x 24" with a half inch rebar. Our walls and flooring are based on half inch rebar with 8" on centers. gunite shall be mixed at the minimum in the proportions of 1:4 parts ratio based on dry loose volume and down to 1: 3.5 parts ratio based on dry loose volume after shot. Our truck's mix design has been verified by Terracon Consulting to mix and produce gunite (after pneumatically applied and proper curring) with PSI strength ranging from 5000+/- to 6000+/- over PSI after 28 days and with a 38-day break. company
3 )Rebar – Box beam 12” x 12” with half inch rebar and the remainder of the pool is 3/8” rebar on 10” centers and in the stress points of the pool we run them on 5” centers.Shotcrete gunite-6,200 psi structural rating-Mixed onsite. Which company builds the best pool structure if I live in Irving texas with expansive soil.