Interesting question but I'm still pretty new to metal detecting and don't have an answer, I do however look forward to what people who have more experience have to say about this. I've used three coils, a DD, a mono sniper coil and a Miner John's Folder Mono and each had their own way of detecting things. The folded mono took some getting used to and I still use a test target from time to time to remind me how it detects toe to heel and side to side while sweeping over a target. I dug enough "large" holes when I first got it to know I'm saving time and effort with my practice tests lol.