Thanks, vferrari! "If you want high conductor depth, then Park 1 would be your best choice. If you just wanted better separation in trash, then Park 2 is a good choice but you won't achieve the same depth for high conductors as Park 1." This answers my question! I was hoping I could have high conductor depth with better separation.
What I meant by "hearing targets better" was that I threw a coin down with nails around it, changed Park2 to 5 tones. I moved the nails in different positions and found Park2 to separate better.
I use the 600.