Is the 4.5 scorcher coil for the GTI-2500 a better coil than the 4.5 sniper coil? A recent post advised me to get an extra shaft for my GTI-2500 and the scorcher coil and I like that idea. I also like the idea of getting the Ace-250 with the 4.5 sniper coil for a back up detector. I believe the 4.5 scorcher is a DD coil, but would have to look and see. I welcome any pros and cons from the experts and more experienced metal detector users. I just want to know if there is a significant difference that would make one coil excel as compared to the other. Thanks.