Gavi time today.
The right one, Marchese di Barolo Gavi, smells extremely sulfuric. Like when you buy some vacuumized pork that smells sulfuric (happens sometimes). Off bottle? Taste is ok, though I think I taste something off. Didn't want to delve further into it, since the smell is off-putting and I'll likely return it. Never had a white wine that smelled like it before.
Michele Chiarlo seems to be a good, known producer. The nose is fresh. Citrus and apple/pear? Obviously(?) good amount of acidity. Tart. Maybe some oak? If so, I would prefer less. Maybe it's just the tartness. Overall a good upscale daily drinking wine.