The gap between what you can do and what you can't, is really something.
cocoさん
ご質問どうもありがとうございます。
下記の言い方ではいかがでしょうか。
The gap between what you can do and what you can't, is really something.
訳: あなたは出来る事と出来ない事の差が本当に目立つもの。
ご参考にしていただければ幸いです。
There's a big difference between the things you can do and the things you can't do.
There's a big gap between all the things you're capable of doing and the things you're not capable of doing.
この場合、次のような言い方ができますよ。
ーThere's a big difference between the things you can do and the things you can't do.
「あなたは出来ることと出来ないことの差が激しい」
things you can do で「あなたが出来ること」
things you can't do で「あなたが出来ないこと」
ーThere's a big gap between all the things you're capable of doing and the things you're not capable of doing.
「あなたが出来ることと出来ないことの差が激しい」
things you're capable of doing で「あなたが出来ること」
things you're not capable of doing で「あなたが出来ないこと」
ご参考まで!