Answered: Difference between tie straps

<R6a> states:

So, by this rule it is very important for teams to find identical “tie straps”. Both length and thickness are the main criteria that the inspectors will be looking at. Please note that it is acceptable to use “tie straps” of a different color.

Ultimately, the final decision on whether or not any part is identical to one sold on VEXrobotics.com is up to the discretion of your inspector.