Variance of mean squared errors (MSE) and mean absolute errors (MAE) across all branches in 8-taxon trees.

The value of balance indicates tree topology imbalance, where a bigger number corresponds to larger tree imbalance. CNN = convolutional neural network; CNN- ROE = convolutional neural network–regression of observed on estimated values; MLP = multilayer perceptron; MLP-ROE = multilayer perceptron–regression of observed on estimated values; ML = maximum likelihood. (XLSX)