system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If all wine is just fermented grape juice, how does one winery make a bottle that's worth $1,000 while another winery makes a bottle that's only worth $2?
gpt
The quality of the grapes, the quality of the water, age, the barrels it is aged in, what yeast is used, how much sugar was added, the temperature, fermentation time, how it was racked, etc etc etc..

Source: Brew beer at home.