Fancy Dumb bell

{
  "data": {"name": "dataset"},
  "encoding": {
    "y": {
      "field": "Team",
      "sort": {
        "field": "Actual Finish"
      },
      "type": "nominal",
      "title": null
    },
    "x": {
      "field": "Actual Finish",
      "type": "quantitative",
      "axis": null
    },
    "opacity": {
      "condition": {
        "test": {
          "field": "__selected__",
          "equal": "off"
        },
        "value": 0.3
      },
      "value": 1
    }
  },
  "layer": [
    {
      "transform": [
        {
          "filter": "datum.Difference > 0"
        }
      ],
      "mark": {
        "type": "rect",
        "height": 10,
        "color": {
          "x1": 0,
          "y1": 1,
          "x2": 1,
          "y2": 1,
          "gradient": "linear",
          "stops": [
            {
              "offset": 0,
              "color": "white"
            },
            {
              "offset": 1,
              "color": "navy"
            }
          ]
        },
        "tooltip": true
      },
      "encoding": {
        "x2": {
          "field": "Predicted Finish",
          "type": "quantitative"
        },
        "size": {
          "field": "Absolute Difference",
          "type": "quantitative"
        }
      }
    },
    {
      "transform": [
        {
          "filter": "datum.Difference < 0"
        }
      ],
      "mark": {
        "type": "rect",
        "height": 10,
        "color": {
          "x1": 1,
          "y1": 1,
          "x2": 0,
          "y2": 1,
          "gradient": "linear",
          "stops": [
            {
              "offset": 0,
              "color": "white"
            },
            {
              "offset": 1,
              "color": "green"
            }
          ]
        },
        "tooltip": true
      },
      "encoding": {
        "x2": {
          "field": "Predicted Finish",
          "type": "quantitative"
        },
        "size": {
          "field": "Absolute Difference",
          "type": "quantitative"
        }
      }
    },
    {
      "mark": {
        "type": "circle",
        "tooltip": true,
        "color": "navy",
        "size": 300
      }
    },
    {
      "mark": {
        "type": "text",
        "color": "white",
        "tooltip": true
      },
      "encoding": {
        "text": {
          "field": "Actual Finish",
          "type": "quantitative"
        }
      }
    },
    {
      "transform": [
        {
          "filter": "datum.Difference != 0"
        }
      ],
      "mark": {
        "type": "text",
        "color": "black",
        "tooltip": true
      },
      "encoding": {
        "x": {
          "field": "Predicted Finish",
          "type": "quantitative"
        },
        "text": {
          "field": "Predicted Finish",
          "type": "quantitative"
        }
      }
    }
  ]
}