You won't find ground balancing on a $200 detector usually. This means that the detector won't be able to adjust for ground mineralization (which is frequently necessary, in my opinion). If you have mineralized ground you will get all kinds of falsing and terrible depth. The other limitation you will find on a low-end detector is loss of accuracy of target ID at depth.
Yet another limitation is volume response to targets. For instance, the ACE250 only has one volume for audio signals. Therefore, there is no ability to associate deep targets with whispers or low-volume signals. And, signals that are whispers don't meet the criteria for giving off a signal, so those don't signal at all and are missed.
To me, this is huge because many of the coins still in the ground that others have not found are there because these are difficult signals. You have to hear the signal to know it's there at all, and you have to have as much information as possible on these tough targets.
And after hearing it, you have to make a decision whether to dig. It's still there because other detectorists walked over it. The easily-heard coins are already gone - what's left (at least in public places like parks) is the challenge.
I read your other posts, and in my opinion (if you can) you should stay away from the low end units since you have experience.
Some of the difference between mid-range and high-end detectors has to do with the number of features. For instance, the E-trac (I'm using that example because that's my primary detector) can be set to multi-tones which assigns a different tone to each different frequency - so with two or three dozen different tones possible, after awhile you can discern between targets (not always, but often) by the level and quality of the tone.
Target accuracy and depth has something to do with it too. Meaning, you will tend to get more depth with the higher-end units associated with better target identification. However, even with the high-end units you will still get very iffy signals that are either surrounded by trash, are very deep, or are next to iron or other metal - but after awhile you can learn to hear these too.
I think the best way to say it is that a higher-end unit just gives you more information overall. It's then up to the user to put that information together, which takes a lot of practice and learning. But if you do the practice and learning, then you can make the most out of the extra information. People who aren't willing to put the time and effort in to do the learning, won't experience the difference for the most part.
Hope that makes sense. And welcome to the forum.
