Calling it [x] stage VTEC is confusing. Like everyone else said, there's multiple versions of the D15B. They're all single-cam 1.5 liter D-series engines. There's a non-VTEC that's pretty much the D15B2 / D15B7 block. There's VTEC and VTEC-E versions, and there's a dual-VTEC version that combines regular and E. Call the weird one dual-VTEC.
Google what a VTEC solenoid looks like - specifically the metal can (the actual solenoid itself). Standing in front of the car looking at the engine, it should be on the left rear of the cylinder head. If there's no solenoid, it's non-VTEC. If there's one solenoid, it's VTEC or VTEC-E. If there's two solenoids it's dual-VTEC.