Is a paid roof inspection more credible than "free estimate"?

[Dean Ng]

I had a property tented for termites, which broke some concrete roof tiles.  I got free repair estimates (inspections) from two roofing companies.  The first estimator, who climbed on the roof, said there were 70+ tiles broken.  The second guy, who used a drone and didn't climb on the roof, said there were 15-20 broken. 

That's a big discrepancy.  I don't know who to believe, so I'm considering paying for a RE roof inspection.  There is a company in Calif called HomeGuard that listing agents use for pre-sale inspections.   Would a paid roof inspection be more credible than a "free estimate" from roofing companies?   HomeGuard is not cheap so I want to make sure this is worth spending money on.