Sonus Faber Guarneri vs Guarneri Memento

Semi, I can only speak for myself, BUT I personally have no problem with any type of tweeter as long as it sounds good. I have owned Titanium domes, Be tweets, ribbons,stats and alum domes-- I enjoyed them all.
However, I do NOT think that I prefer a 'romantic' presentation, although a bright presentation does bother me. I do feel that if a speaker has a tendency towards brightness and "glare" then very likely the culprit is the tweet. (and many times that tweet is a hard dome).IMHO you cannot really generalize so much in regards to people's taste in presentation as much as you may think.
Interestingly, I have a female 'phile friend, whom has superior high-end hearing capabilities to my male 'phile friends high-end hearing . She can pick up a
bright/glaring speaker in a country minute; she almost always dislikes titanium domes and in fact told me that she actually HATES all Wilson's for this reason. My female friend also tells me that her older husband cannot hear this problem and likes Wilsons along with many other what she calls 'Screaming' speakers.

If someone picks a speaker because of its tweeter behaviour, or soundstage or any other audiophile trick, he/she is missing the point. I pick a system or a speaker for the matter, based on the overall presentation of music and how the artist intention is rendered thru the chain, anything less than that becomes boring talk and a waste of precious time IMHO.

Trust your own ears is what I always tell people, you system should please yourself, not others.

If you have a chance to hear a super high resolution system consisting of diamond/ribbon/Be tweeters at length, even better if you can live with them for months, and go back to hear an older silk dome, you will know what I am talking about.

I am super sensitivie to brightness/harshness of any kind, I sold my Wilson WP 5.1 after owning them a month for that exact reason. I still like Esotar based speakers because they are very easy to listen to, but when compared to newer and better tweeters Esotar is showing its age. Sorry, technology in mechanical, electrical, and psychoacoustic engineering have advanced very far in the past 20 years. I have to admit diamond tweeter is very seductive, as much as I used to hate B&W (sold 802N in no time too), the new B&W diamond are very capable speakers as well as other diamond speakers like Tidal, Avalon, and Marten Design.

An older design that masks out micro dynamic and details though pleasant to listen to can't be called world class when compared to the current SOTA. Not saying GH is garbage, it's far from it, but GM simply does more in recreating music and that's a fact.

Once again Semi, what is IYHO a 'fact' is far from it.
Is the Esotar still SOTA, not to your ears, ok I can accept that, however,
to say it masks micro dynamics and detail tells me that there is something else in your system that is the culprit in that area.( The Esotar certainly does not do that in my system, in fact my female a'phile friend enjoys this aspect greatly and I suspect she has better hearing than you do!) I don't know what is in your system as i notice that for some reason you don't post it on 'Agon and therefore we have no way of seeing your room or equipment.
I presume that you own the GM's and therefore the bias.BTW, you seem to have owned numerous pieces of equipment that have come and gone, are you really happy with the GM's?

All I know is.. If I were left alone with a set of Guarneri Memento's for more than an hour.. terrible things would happen to em'.. >: )