Different Coy SOPs, Aircraft Certifications & NAV Environment
Just to add to the information, or confusion...
Part of the reason why there might be different company SOPs/FMs with regard use of LNAV/VNAV minima are dependent on whether or not the aircraft have certificated final approach temp compensation embedded or not.
Further if operating in an SBAS environment (eg, where WAAS available within required minimum integrity levels - ie, no alerts), then the VNAV minima can also be used because the vertical guidance is not relying on the baro but instead getting the feed from SBAS-related avionics.
Refer to the attached extract from the ICAO 8168 PANS-OPS procedure design criteria for Baro-VNAV procedures
So, if final APCH auto temp compensation or SBAS not available, then the LNAV minima must be used if the temp is BLW the NA Temp published on the plate.