You should not read anything into the "Business" class designation. It's just there because the flight carries a J/C/D/I/Z fare class and certain DL systems will call it "business" based solely on the booking class. .
That's not entirely true. All international flights to central and south America that use a domestic first hard and/or soft product are technically considered business class. In some cases there are real differences, like a D1 light type of service, with printed menus, etc. In this case the only difference between domestic F and "business class" will be sparkling wine offered as a PDB and sky club access. Also note that this matches what Aeromexico calls this service.