which finish is recommended for durability for refinishing of an 8 year old oak floor and a 60 year old oak floor? One quote is for 3 coats of pacific mega waterborne urethane and the other quote is for bona traffic finish (no # of coats in quote). No children, great dane that occassionally visits, 2 cats.

Bona

All three of those finishes are made by Bonakemi.

The most durable is Traffic. The second most durable is pacific strong and the least durable is Mega. You mentioned Pacific Mega but pacific usually refers to Pacific Strong and mega is simply called "Mega".

Our industry standard is typically 3 coats of finish or one coat of sealer and two top coats of finish. All three of the above mentioned finishes are waterborne