Both are Modern. Pulling the matchup for the last 90 days and a longer window.
In Modern, Neobrand and Broodscale are essentially an even matchup, with Neobrand very slightly ahead.
The edge is about one match in a hundred, so it is within noise. For context, Neobrand's overall recent win rate is 50.2% and Broodscale's is 52.8%.
Sources: Data from 142 Modern tournaments in the 90-day window that included Neobrand (64% MTGO, 36% Melee).