They will taste better, but be prepared for much smaller sizes than you are used to. And there is nothing wrong with that, it's just that most vegetables are as large as they are because they absorb a lot of water and effectively their larger size in the most literal sense dilutes the bits that give the vegetables their taste. That's why for instance smaller tomatoes taste so much better than the larger ones.
They won't necessarily taste better. One of the things we've been breeding for is better flavor. Also yield and shelf life, so some will definitely taste better.
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