Comparing concave from Turf and Concaveman

both.json

concaveman.json

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Polygon",
        "coordinates": [
          [
            [
              12.480278040216104,
              41.894028607681896
            ],
            [
              12.479482691180369,
              41.89657521122995
            ],
            [
              12.48052637455828,
              41.89849263017274
            ],
            [
              12.48288988828719,
              41.89821122875663
            ],
            [
              12.484290532739005,
              41.89847574336856
            ],
            [
              12.48691631019514,
              41.8965549030047
            ],
            [
              12.491042589325572,
              41.89588979628056
            ],
            [
              12.492378870470459,
              41.89674707108108
            ],
            [
              12.493752410574729,
              41.89555906491028
            ],
            [
              12.490469677635723,
              41.89356439367692
            ],
            [
              12.490446608177754,
              41.8880262819213
            ],
            [
              12.491900701796553,
              41.884893222348325
            ],
            [
              12.485119995944173,
              41.892384062689565
            ],
            [
              12.483770746018557,
              41.8942191575813
            ],
            [
              12.480648962395106,
              41.89408129845556
            ],
            [
              12.480278040216104,
              41.894028607681896
            ]
          ]
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [
          12.490446608177754,
          41.8880262819213
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [
          12.491900701796553,
          41.884893222348325
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [
          12.493752410574729,
          41.89555906491028
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [
          12.492378870470459,
          41.89674707108108
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [
          12.491042589325572,
          41.89588979628056
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [
          12.490469677635723,
          41.89356439367692
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [
          12.490446608177754,
          41.8880262819213
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [
          12.479482691180369,
          41.89657521122995
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [
          12.480278040216104,
          41.894028607681896
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [
          12.480648962395106,
          41.89408129845556
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [
          12.483770746018557,
          41.8942191575813
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [
          12.485119995944173,
          41.892384062689565
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [
          12.488880009400596,
          41.89571626668174
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [
          12.48691631019514,
          41.8965549030047
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [
          12.484290532739005,
          41.89847574336856
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [
          12.48288988828719,
          41.89821122875663
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [
          12.48052637455828,
          41.89849263017274
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [
          12.479482691180369,
          41.89657521122995
        ]
      }
    }
  ]
}

input.json

turf_concave.json