hickok45 compares the Browning BAR against the FN SCAR.
Frankly, I’d be interested at throwing the Ohio Ordnance HCAR in the mix.
If it’s as reliable as their testing seems to indicate, I’d prefer a 30-round .30-06 over a 20-round .308.
I’d also want to spend more time in the gym. Eve though it is almost half the weight of the BAR, the HCAR rolls into action at a beefy 12 pounds.