G'day Richard.
Your asking a bit of a no brainer really. The X-terra is no match for the Omega. While I like it, the Omega ID's targets far better than the X-Terra. Pull tabs are easy to work out, screw caps are fairly easy to tell apart from coins and today I discovered that aluminium football studs are also easy to tell from goldies, registering as an 82. I still much prefer the pitch of the tones of the X-Terra 70 over the Omega and also the volume control which the Omega seriously needs. I Find that I hunt in D2 tones on the Omega for it's modulated tones is a significant advantage over the X-terra but unfortunately, I do find that the poor tone range of the Omega, which in most tone set ups, puts all our modern coins into a single tone. That can cause ear fatigue, which in turn can lead to you walking over targets if you switch off in trashy ground.
The overload feature, although a little annoying, is actually a very effective discrimination tool on shallow targets. This is what helps in separating what's what like screw caps and pull tabs. $2 coins hardly give off an overload signal, $1 coins do, but screw caps do a lot more.
I'm still very new to the Omega, so I'm sure I'm probably going to go through a period were' I'll have dark thoughts about it while I go through the learning frustrations, but I haven't had that as yet. Who knows, this might be the first detector that I might be spared that. time will tell, but at the moment, it just seems to talk to you fairly efficiently and pinpoints really accurately too.
Yes, it's discrimination is tighter than the X-Terra. Those footy studs are a clear example. On the X-terra, they sound like a $2 coin because of there size. $2 coins generally show up as a 77 and $1 coins as a 79. It's when you get these numbers, followed by watching the intensity meter, modulated tone and how much overload you get on the respective numbers, that helps to ID the goldies. I've only found around $20 so far, so it's real early days. 5 and 10c pieces are a delight to recover too,5c read as 55 and 10c as 57. Pull tabs go from 56 to 61. The overload signal makes telling them apart a black and white call! Even those dreaded new rounded pull tabs which most other detectors see a a coin. I even seem to enjoy recovering pull tabs too, simply because I know that that's what it is and I just like proving it to myself. A bit twisted, but fun.
Mick Evans.