There are 3d Printed options also to direct the flow -The wide flow nozzle seems to be about the same as the stock configuration, except that you can point the flow in different directions. The narrow one seems to push the water further. I didn't know if that makes any sense.
On my 24x24 cube I use the narrow one because I can direct the flow so that it doesn't directly hit any corals. I was a beginner when I set the tank up and didn't think about where flow would go, especially when the corals grew larger.
So the narrow nozzle allows me to put the Vortech on my back wall, and aim the flow up and to the right along the glass so that it doesn't directly hit any corals.
Now compared to the tunze I'm not sure because I've never used them.
It's definitely narrower than a Nero. The Nero's have a pretty wide spread imo.
https://coralcartel.com.au/products...93132&pr_ref_pid=8753301061868&pr_seq=uniform
