im going to help you out ..
Kellyco Metal Detector Comparison are not the same but you cant go wrong with ether 1 ..............
ACE 350 ......8.25khz is better for small gold

.... fishers 5.9khz which is better for deep relics coins... well that's what i here
fisher takes a 9v battery ...ace 350 4 aaa batters
fisher f2 has a 5 y Warranty........ace 350 2y
ACE350 looks cool

... Fisher has always been the proven leader in metal detecting technology for almost 80 years
Fisher was granted the first patent ever issued for a metal detector.
Fisher was first to develop TR (transmit-receive) and BFO (beat frequency oscillator) circuits for use in metal detection equipment.
Fisher was first to develop VLF (very low frequency) version of TR circuitry for metal detectors.
Fisher was first to design metal detector circuits that discriminated against 'Trash items" while still detecting good targets.
Fisher was first to supply military forces, utility companies, treasure hunting customers and governments with portable hand held equipment.
Fisher was first to design detection equipment capable of detecting objects as deep as 450 feet.
Fisher was first to design detection equipment specifically for coinshooters and relic hunters
get the fisher F2 with the DD coil 300$

... lol thats my 2 penny's
