I have all 3 of them, and I have used all three. I have not yet directly compared them.
What I can tell you is that I got the 13x11 for competition hunting. It has a 50% bigger footprint than the 9" coil I got with my Deus. I thought that might give me an edge as it's all about speed. However I ended up using the 11" coil simply because it's a bit lighter and better balanced but still gave me a decent footprint. Let's be honest most competition hunts are over in 15 minutes no matter how long they run so you only have to go all out for a little bit, then you can slow down or leave the field.
The bigger coils are going to go a bit deeper while the 9" is going to separate better is I think the bottom line. I really need to compare the two larger coils to see if the 13" goes any deeper. The 11" is for sure lighter - but having swung Minelabs in the past the weight doesn't bother me it's the balance. You will notice swinging it a difference there. Someone came up with a piece that is supposed to offset the coil in relation to where the rod attaches and fix the issue but I don't have that. If that were added I'd say for a healthy adult you won't really be bothered by the bit of extra weight if you've ever swung an Explorer.
Once I have a chance to do some head to head testing I'll post more!
What I can tell you is that I got the 13x11 for competition hunting. It has a 50% bigger footprint than the 9" coil I got with my Deus. I thought that might give me an edge as it's all about speed. However I ended up using the 11" coil simply because it's a bit lighter and better balanced but still gave me a decent footprint. Let's be honest most competition hunts are over in 15 minutes no matter how long they run so you only have to go all out for a little bit, then you can slow down or leave the field.
The bigger coils are going to go a bit deeper while the 9" is going to separate better is I think the bottom line. I really need to compare the two larger coils to see if the 13" goes any deeper. The 11" is for sure lighter - but having swung Minelabs in the past the weight doesn't bother me it's the balance. You will notice swinging it a difference there. Someone came up with a piece that is supposed to offset the coil in relation to where the rod attaches and fix the issue but I don't have that. If that were added I'd say for a healthy adult you won't really be bothered by the bit of extra weight if you've ever swung an Explorer.
Once I have a chance to do some head to head testing I'll post more!