Had it done at 2 houses, and after research + personal experience I'm of the opinion they are commoditized.
https://www.epoxyfloorshouston.com/ both times for reference.
What I mean:
It comes down to installer, which with most companies will be young guys rotating into/out of the job, so hit or miss. First was good, second was less good (in terms of attention to detail, perceived quality of work, persistence of epoxy over time, etc.).
Level/style of application you opt for, I went for the best epoxy and layer count I could get.
Really watch the prep process, I wouldn't leave them alone to assume prep coverage and depth is done 100% correctly.
Just go with best price/special and be there when they're doing it.
Both inside 610 loop for service area reference.