In your opinion what would you prefer for a fastener?

In our new(er) home, the subfloor is Sturdifloor..a panel strip/OSB looking
product.
We were going ceramic tile thru much of the home at and the installer said
that a plywood underlayment would be better than the chipboard underlayment
sheets used in many nearby homes. We went with the PLY as it was only a few
dollars more per sheet than the chipboard. The installer picked up a 5
gallon pail of white (carpenters) glue..he spread it liberally across the
floor, placed the plywood sheets perpendicular to the sturdifloor sheets
then used a LOT of air gun 15 GA staples to nail it down. Been in here 5
yrs now and no problems with the floor, no "bounce", no tile grout cracking.
Seems pretty solid. I'd go that way again