Both are great machines, although the Fisher will work better in bad ground due to its lower frequency. Even though the Tejon has an adjustable GB and the 1266 does not, the 1266 gets better depth in mineralized ground. It loves iron though. The Tejon is a little better at picking up small items. The Fisher is heavier but perfectly balanced and built like a tank. The Tejon is lighter and although it doesn't seem as sturdy, it is.