My opinion is a post frame is faster and cheaper to put up for enclosed space.
But you face the problems with wood buried in the ground (likely another generation's problem if you do it correctly and spec UC4B treated posts) and the costs can increase as you start to finish out the interior with wiring, wall covering, insulation, may need to cross-strap the bottom chords of the trusses if they are widely spaced.
There are some variations which might be allowed in your zoning area...a "trench foundation" with monolithic pour or a frost protected shallow foundation (FPSF...google a HUD .pdf document for more info) both give you stick frame potential at lower concrete & earthwork costs.