That's the way I see it as well. I think the Gilgo 4 are one killer and the other guy is a butcher who as part of his signature or MO he wraps or encloses the body (in something other than burlap). In my mind, the following local cases would fit that criteria:
Cherries
The womans stabbed torso had washed up in a
suitcase on a Mamaroneck beach on March 3. Her right foot and leg washed up in Cold Spring Harbor on March 27.
Investigators describe her as a Hispanic or light-skinned black female 510, 180-200 lbs wearing a red camisole with a Spanish label, purple Champion sweats, tan long-sleeved Voice T-shirt, blue bra, and a tattoo of two cherries on right breast. Scraps of paper in the crevices of the suitcase form a calendar page that says cinco and begin to live. The suitcase was made by InGear, model Protege, sold only at Wal-Mart.
Peaches
On June 28, 1997, on the west side of Lakeside Drive, 200 yards north of Peninsula Boulevard, Hempstead Lake State Park a black female torso was found with her arms, head, and legs below the knee severed.
A man hiking with his son found her in a green
Rubbermaid container, along with a red towel and floral pillow sham. Investigators say she was between 16 and 30 years old, had an abdominal scar from a cesarean section and a tattoo of a peach in the shape of a heart with a bite taken out of it and two drips falling from its core on her left breast.
Investigators call her Peaches and she was dead up to three days before she was found.
Her fingerprints and dental history gone, Peaches was wrapped in
black plastic garbage bags and stuffed into a large green
Rubbermaid container, along with a red towel and floral pillow sham.
JT
A skull, hands and forearm belong to Jessica Taylor, a 20-year-old woman who disappeared in 2003 and was last seen working the streets of New York City, her body found in the Pine Barrens of Manorville. A skull, hands and leg bone belong to the torso of a woman also found within miles of Taylor in 2000. One set of remains belongs to a female child between the ages of 18 and 24 months. Another belongs to an Asian male in his late teens to early 20s.
Between the two is a path of wild grass, and today, a torn-up mattress, broken and discarded toys and ceramic statues, rusted Reddi-Wip cans probably used by kids to get high, and piles of sticks and chopped wood. It was on top of one of these piles that, on the morning of July 26, 2003, the woman discovered the naked body of 20-year-old Jessica Taylor on a
plastic sheet, her head and hands cut off. They have never been found.
JD 6 (2000)
https://identifyus.org/cases/9680
The body belonged to a white woman in her 30s with brown hair. She had been dead for several weeks before her nude, headless body was found, cut into pieces and stuffed in
plastic bags. Her hands and right foot were never located, and police say the woman must have had some kind of identifying mark, like a tattoo, on her ankle that the killer had wanted to get rid of.
(JD 9) https://identifyus.org/en/cases/9098 /Nassau & Davis Park
Right lower leg has a 3-1/2" scar on the lateral mid leg area, a 1" linear scar on the lateral mid to lower leg and a 1/2" scar on the medial ankle.
The left leg has a 2" surgical scar with adjacent suture scars on the medial left ankle.
Tattoos Piercings Artificial body parts
and aids Finger and toe nails
The decedent had red toenail polish on all toes.
Head found in
black garbage bag
Tanya Rush
Tanya Rush of East New York worked as a prostitute in Brooklyn, police say, until she went missing in June 2008. Her body was found days later, stuffed in a
suitcase along the Southern State Parkway in North Bellmore. Dismembered according to several reports.
JD10 (mother of infant)
??? no information released
Wading River Road in Manorville
On February 18, 2012, skeletal human remains were found by a man walking his dog in Manorville, near Wading River Rd, close to a county park. The remains were found wrapped in a
bed sheet and plastic bag. Police have not officially linked this to the other bodies, claiming it was too early to tell.
So obviously I think it might be helpful to keep an eye out for serial cases elsewhere in the US with that similar MO.