Just construct a DataFrame from the names and scores?
julia> using DataFrames
julia> m_names = ["EvoTreeRegressor", "BaggingRegressor"];
julia> sc = [2.5212, 2.5358];
julia> DataFrame(Model = m_names, RMSE = sc)
2×2 DataFrame
│ Row │ Model │ RMSE │
│ │ String │ Float64 │
├─────┼──────────────────┼─────────┤
│ 1 │ EvoTreeRegressor │ 2.5212 │
│ 2 │ BaggingRegressor │ 2.5358 │
You can still display that in Juno with showtable
but also write it to csv with CSV.write("results.csv", df)