Thanks doggoneit,
The trouble with answering these questions is leaving my "fanboy" ideas. While they seem absolutely relevant to me, when speaking to people around the US, and others including yourself in the great white North, not so much.
All souls are different, people's hunting styles and choices of area are different, heck everything's different.
Hard to give an opinion that would say whether one should have this or the other should have that is far beyond my understanding.
The best I can do is state without opinion ion what I've found and again that's here in my soil. Again grain of salt because in different soil things change.
Hot rocks, magnetite, etc change things.
Based on what you said about the mineralization in your area, the compadre is still a great competitor.
I don't have soil issues and love my compadres.
Especially if I've had a couple sips and want to hunt my apartment complex. So easy to turn on and set disc and swing.
That being said, for the most part of my country and yours, there will be bad soil so for the price the Mojave can't be beat.
I will never let go of my compadres, and if your soil is as nice as mine, I can definitely recommend picking one up.
If you only pick one, I'd say the 8". That was my first and the 5.75 was for trashy areas. The 8 still does well but figured why not for the price.
The compadre is the best thing you can buy even for, well before the Mojave, $100 above the cost.
But all things considered, as long as you aren't putting yourself out on a limb with the extra cost, the Mojave is a great buy.
My way of handling these decisions is obviously buy them all.
But my situation was a certain one at the time of me picking up my collection.
Not everyone, including me now with my hours at work, can buy that many.
So if you can only buy one between the Mojave, compadre 5.75 and the compadre 8" I'd say the Mojave.
My compadres will always hold a special place in my heart.