If darakara characteristics is totally different from 7th lord characteristics? Eg: dk venus in venus and 7th lord is Saturn? Spouse traits would be?

Some astrologers says the spouse nature is often from 7th house , im having empty 7th house in both d1 and d9 charts , cancer ascendant pisces nawamsha, 7th lord is Saturn .
So its a mature partner and a business contract type marriage?
But my DK is venus in venus.
So my spouse will have saturnian traits or Venusian traits? Can someone explain. Thanks in advance 🙏