Pokersnowie is an artificial intelligence calculator that automatically adapt to the user´s tendencies based on trillions of hands tracked on their database from all the people that have used and continue to use the software. Of course, it based their decission on a really close GTO approach.
PioSolver, GTOrb, Simple Postlflop or any other GTO based solver out there "solves" a particular situation based on the information provided by the user during off the table work.
Its like after you sessions using pokersnowie and check your results you imput a particular spot you played on snowie into any of those GTo solvers and the results should be very close to each other.