And I'm sure its open to a lot of debate. I do know that the cortes that I had dug deeper items than the Pantera that I also had. That is about a two generation difference between the detectors. So, I'm sure that the Tejon/Vaquero/Cibola might be a little deeper since it uses a bumped up gain. I personally liked the discrimation qualities of the older Tesoros than the Tejon that I had.(As well as the slower retune speed).
So, I dont know...The grass always looks greener when your standing on the other side of the fence, but it always seems like when you climb over to get a taste, its then you discover that its not grass but poison ivy. At least thats what I'm finding with a non-Tesoro detector that I recently purchased.
As per your question on Tone ID...On most Tesoro detectors, you get a single tone for any target that you pass your coil over. On some detectors that they have made(Pantera, the whole Golden series, the Cortes) different target segments have been broken up into different tones. So that way you can easily tell the difference between a nickel and a dime, because the nickel will have a low tone, and a dime will sound off as a high tone. Its a very handy tool for discriminating, without having your eyes glued to a display screen, looking for the same info. I've found it to be much more indicative of a target than VDI(coins have a very unique tonal quality).
Just my two cents...
J.