Personally, I don't think "Branding" has a lot to do with purchases any more, my personal thoughts are that people go for the way that products are advertised nowadays.
In the Locksmith Trade we have to provide specific products that people associate with YALE or CHUBB - we don't sell those specific brands, we sell them an equivalent product that is either the same standard or better.
Take for instance the Yale BS Euro Cylinder - Anti-Snap, Anti-Drill, Anti-Screw, Anti-Bump and Anti-Pick protection. from £29.99 + VAT
We sell the Eurospec BS MPx6 Euro Cylinder - Anti-Snap, Anti-Drill, Anti-Twist, Anti-Bump, Anti-Pick and Anti-Plug Pull protection. for £19.99 + VAT (any size)
From my personal experience of both Cylinders I'd go with the Eurospec version every time, not just because of the cost but because I believe it's a better design and I'm getting more for my money.
Both Cylinders are virtually the same to the untrained eye, but for me the quality of the Eurospec Cylinder is 10x better.