Cat6 vs Cat6a - Let's take a look at the difference between Category 6 and category 6a bulk ethernet cable. As you can see, the Cat6a is larger and heavier. The Cat6a weights 53 lbs and comes on a spool and the Cat6 weights 33 lbs and is packaged in a reel in the box. The Cat6a is twisted much tighter due to the higher performance requirements.