The issue with wine kits, and a lot of home made cider, is that they fail to go through malolactic fermentation, this is critical for converting malic acid to lactic acid and results in a far smoother, less "sour" product. Sour is probably the wrong word, but lactic acid is a more smooth mouthfeel/tasting acid than malic acid. Some of the premium kits may have already had the malic acid converted...... not sure.
If you make cider from kits or bottled juice, buy some malo culture from one of the site sponsors and pitch it toward the end of fermentation.