Just the back story for comparing purposes...I threw zones and a lot of them as my disc of choice for this slot for about 3 years. Last year, a buddy of mine convinced me to try the harp, because I was such a hard sell some I liked the zone so much. I now no longer bag the zone, and carry minimum 3 harps based on the course.
The zone I found to be more LSS, less glide, and just a little shorter than my harps. Harps, except for my beat bt hard, have just as good HSS. My harps I throw out to about 270' while I kept the zones out about 260'. The harps are just more versatile for me. My vip harp is very similar to my puddle top esp, and I also have a fresh hard for hyzer drives and a beat bt hard that will hold an anny for me. When I was throwing zones, they were primarily hyzer and flicks. Harps I can work lines with and cover anything within 275'. Without typing another 2 paragraphs on this, the versatility and availability between plastics for the harp to cover all these shots kicked out the zones.