The GBSE and the G2, with same size searchcoils attached, will probably have comparable performance, although some details of the machine's responses will be slightly different. I don't wish to discuss those differences because a complete and accurate list of differences will not be possible until we're shipping it.
Now c'mon, J.T., let me guess, the closest you've got to a GBSE is a picture on a puter monitor, a couple peoples' posts about hots have ya droolin', and you're already asking for something even hotter? Thou knowest not what thou asketh! But what the heck, if we find an easy way to do that for ya between now and shipping date.........??? Theoretically possible, but my recommendation is not to expect it.
I would suppose that if someone is holding out for the G2, the most sensible reasons for doing that would be:
1. Preference for the gripmount mechanical package (as opposed to the GB pole mount mechanicals).
2. Your favorite dealer happens to be a Tek dealer and not a Fisher dealer.
3. You know you need the 11 inch searchcoil and don't expect to need the 5 inch searchcoil. (This also means you're not doing gold prospecting.)
Regarding electrical interference: In the engineering office (whole slew of computers, electronic phone system, personal cellphones, electronic fire alarm and thermostat system, overhead flourescent lamps, digital scopes, etc.) the GB can usually be run within about an inch air test "depth" of its out-in-the-boondocks sensitivity level. Without frequency shifting. There is no way to say how it will compare to some other machine in some other environment because different machines respond differently to different kinds of electrical interference.
Target separation: comparable to our other best stuff.
Depth: all depends on what you think "depth" is.
The question of what kind of a coinshooter this new platform is, keeps cropping up.
1. It does not have the feature set that US customers traditionally expect from a good coinshooter.
2. The operating frequency is 19 kHz, which works against it on the deep silver.
3. Despite all that, it's a hot but surprisingly tractable, and easy-to-use machine.
That's the kind of coinshooter it is, for better and for worse. Of course, what a particular potential customer really wants to know is whether they will like that kind of machine, or not. It's a question I can't answer.
In roughly the same price category, the company (although not necessarily the same dealer) offers the Omega. I have no hesitation in recommending the Omega as a coinshooter because it was designed as primarily a coinshooter and is getting very good reviews these days. It was slow to take off because it did not showcase any new hifalutin technology or even a brand new look. It was just a metal detector done exceptionally well, and that was difficult to convey in advertising.
There are of course excellent Fisher coinshooters from the F2 on up, but the coinshooter we make which is most directly comparable to the GB platform machines is the Tek Omega. It's not a coincidence: when we decided to do a new Gold Bug, our conceptual starting place was the Omega. It's easy to see that influence on the design. But to get dedicated gold machine performance characteristics it was necessary to create a whole new platform around that overall concept.
--Dave J.
Im so happy. I hope some people on here will help me with questions about it. Very nice a fast service for Kellyco. I can't wait to post some pictures and videos using it out in the field and at the rivers next to my house. 
--(1) Are the coils inter-changeable on the new Gold Bug SE and the Omega (do the same coils work on both of these two detectors)?---I realize they are totally different khz but thought I read somewhere they were inter-changeable.---(2) What coil(s) are comeing stock on the GB Pro?--------Thanks, Del ----P.S. Forgive me if this has been gone over--just trying to understand some of this.