“Unlike stainless, concrete is porous and allows for some oxygenation while not imparting any flavor, like oak does,” says Leslie Renaud, principal winemaker at Martin Ray Winery in the Russian River Valley, who makes Chardonnay in both concrete tanks and French oak barrels. “The oxygen exposure also allows for faster maturation than stainless.”

https://pix.wine/the-drop/fermentation-vessels-tasting/