Genuine VELCRO® Brand or Un-Branded?
The VELCRO® Brand is a highly protected trade mark and contrary to popular belief it is not the name of the product, however often unbranded tapes are old as VELCRO® simply because the name is such a widely used term. Velcro Industries spend thousands on creating the perfect fastener for almost any industry, from standard adhesives and sew-on to automotive use and even in space, along with continued commitment to increasing the range; they also have a team dedicated to protecting their name.
Some unbranded tapes are very good, however none offer the range that the VELCRO® Brand offers and even the best un-branded tapes differ from the original's and creators of the hook and loop system.

The picture shows a strip of unbranded red hook and loop on the left and a strip of genuine VELCRO® Brand on the right, instantly you can see a colour difference and when in front of you the quality really does show through, colours are the easiest to tell, but black and white also have differences.

The tape is an even colour but the hooks almost always loose their colour. Another way is to feel the tape, many unbranded options are firmer that the leading brand, you can almost fold a line in to some, this makes sewing hard and often ends with broken needles.

VELCRO® brand sew-on is also softer that is not as aggressive to the touch, this makes sewing much easier.
One of the biggest problems is that generic hook and loop is imported from many different manufacturers, whereas VELCRO® Brand is made by Velcro Industries by their own factories throughout the USA and Europe, this gives them complete control over quality and ensures that every hook and loop is woven the same way. Only VELCRO® Brand offers a consistent fastener that is of exactly the same quality on every batch.