A spurned wife is squeezing her wealthy investment-fund husband for millions in additional alimony — a revenge premium for dumping her in favor of a Manhattan woman who is a virtual carbon copy of herself, minus 15 years, The Post has learned.

“Her social circle is telling her that the new girlfriend is ‘a new version of you,’ ” one intimate of wife Sydney Davis said about portfolio manager Andrew Davis’ paramour, Kathryn Pickett.

Andrew is now private-jetting the younger blonde around to the same haunts in Taos, NM, and Stratton Mountain in Vermont that he used to enjoy with his older blond wife, the insider said, adding, “The friends are all buzzing about that.”

Davis Selected boss Andrew Davis is a great-grandson of New York investor Shelby Cullom Davis and was married for 18 years to Sydney before trading her in for a younger model.

Before 39-year-old Kathryn Pickett came along, the divorce had been chugging along amicably in a courthouse in Santa Fe, where the Davises now live in separate mansions, sharing custody of their teen son and daughter, according to court papers.

Andrew, 51, and Sydney, 54, had agreed that $5 million would hold the wife over for a year or so, until the property — two homes in Santa Fe, a vacation home in Taos and a summer retreat in exclusive Seal Harbor, Maine — could be divided and a final support figure set, papers said.

Then along came hubby’s new girlfriend, Pickett, a former investment banker who runs an Upper East Side printing boutique.

Now that $5 million isn’t looking like nearly enough, friends of Sydney told The Post.

So she hired top New York divorce lawyer Bernard Clair, who has put Andrew on notice that the $5 million “interim settlement” paid in September is no longer sufficient.

Except for age, the women have a lot in common. Both are tall, athletic blondes. Both hold finance degrees from good schools — the younger from Harvard, the elder from Georgetown.

And both have a thing for multimillionaire money men — in 2012, Pickett filed for divorce from Manhattan investment big Brett Pickett, son of former Islanders owner John Pickett.

“The parties have significant income which averaged over $50 million a year . . . from 2004 through 2013,” the new papers say.

“During that . . . period, [their] expenses averaged between $8 million to $10 million a year,” the papers say. Sydney is expected to demand half of that amount — between $4 million and $5 million a year for the duration of what will now be a lengthy divorce.

Lawyers for both sides declined to comment.