My F2 can definitely pick up tiny gold as you described, as long as the sniper coil is mounted.
Like this clasp on this tiny, thin gold chain which both the F2 and sniper coil and my Compadre easily saw as a solid target I would want to dig.
Once I switched over to the sniper coil on the F2 it rarely ever came off because my precious metal targets and coin count more than tripled after I did.
My F70 can also find that shiny, tiny stuff with most coils but the smaller snipers make it even easier.
If you are going after a new unit because you want a change or want to experience the multi freak phenomena and their ability to deal with mineralization or combat masking easier like my Nox that's cool, I get that, that is why I own and love to switch around between a Nox, my Fishers and my Tesoros of which both my Compadre and Mojave can easily pick up those small golden targets, also.
If you want multi frequencies to help you find more coins maybe a bit easier I get that too...I deal with massive masking issues where I live and as I mentioned the Nox does that very well.
My F70 also does a great job in this area and and finds coins and targets deep in all kinds of site conditions, (once I learned it well), but the Nox just takes less effort to do it right out of the box.
However, if you want to spend this money to buy a new multi freak unit solely to find the tiniest of tiny gold like that gold clasp in my pic or pinbacks or any of the other real small stuff we might miss, well, good luck with that.
That real tiny stuff is rarer than rare even compared to tiny gold jewelry like the way more common really small and thin kids or woman's rings like this one.
10k, tiny, thin, weighs hardly anything and found with my Vaq in the sand at the beach at about 10" deep...easily found with the Vaq as a matter of fact, in disc.
This is actually the first piece of gold I ever found.
If you think buying a Vanquish or Nox or any other multi frequency detector will magically fill your treasure pouch with a ton more of those extremely rare really tiny gold targets you think you are missing I think you will be sorely disappointed because I doubt any of this new multi-freq tech will find you much more of that rare tiny gold than what you have found till now...if any at all.
To find that kind of thing you have to be lucky enough to roll over it, have a tool that can indicate you did and most importantly of all you have to recognize it as something you actually want to dig, which, considering most of these really tiny gold targets usually come in really low like in iron, ain't easy for any of us no matter what skill set you possess.
Of course you will find a lot more gold, tiny or big, more silver, more coins or anything else out there if you dig absolutely every signal you come across, and I mean become a literal "Dig it All" hunter, you definitely will be successful but at what cost?
If I was forced to do this hobby this way, and only this way, I would sell all my equipment and quickly exit this hobby because that is not the way I would enjoy this hobby...at all.
I pick my detectors and and attempt to learn them to the best of my abilities for the exact opposite reason...to dig the least amount of trash while still finding the most and best treasure which seems to be working well for me, so far.
Monte stated this...
"The Fisher F2 is NOT a very good model for unmasking good non-ferrous targets in a lot of dense ferrous debris. Also, due to the operating frequency, it is going to work close to my loaner-unit Fisher F-44 when hunting for smaller-sizE, lower-conductive gold jewelry, and that's not a strong point for them."
On this he is correct, but your F70 can definitely perform these tasks much, much better than just well, as well as finding tiny precious metal micro jewelry pieces.
I think maybe you just don't have enough experience using that one to realize that as yet.
Buy the new tech to help you find more coins or more masked targets or deeper targets than the F2 can or to get a bit more stable and solid info on deep targets than your F70 or just to experience this different technology but expecting to purpose this new one to just target that really small gold and assuming it will actually find it, any of it, would be a fools errand.
Just my opinion, of course.