They are just to different to compare in all honesty.
The zx7 is near the top of the food chain as far as cassette decks go.
It has extended highs and lows but still manages the neat trick of playing buttery smooth and sweet.
The 401 has very extended highs with present phono and cart and is more engaging , fast and dynamic. It is a quite vivid reproduction of music.
I am thoroughly enjoying both.
The zx7 is near the top of the food chain as far as cassette decks go.
It has extended highs and lows but still manages the neat trick of playing buttery smooth and sweet.
The 401 has very extended highs with present phono and cart and is more engaging , fast and dynamic. It is a quite vivid reproduction of music.
I am thoroughly enjoying both.