IMO the branding issue is just a bit of a side issue.
In this case aerotropics was purely a piston engine operation, whereas Transair was predominately a turbine operation.
Therefore, Transair had the experience and checks and balances in place for a turbine > 57000kg operation already in place, whereas Aeroptropics would/did not have.
As to knowing who you really are flying with, well that’s fine and beaut but the reality is that when you buy a ticket for travel on any airline you should expect the same level of safety on brand X as brand Y as brand Z.
In other words it really shouldn’t matter who provides the service as the Regulator should have ensured the premise of equal safety.