My speaking voice is so different from my singing voice that friends used to say, "I can't believe that sound is coming out of your mouth". Low speaking voice, soprano singing voice. Over the years -- nearly 70 of them now -- I've learned to extend my singing range downwards. Now I sing each song in the range that works for me. I don't like vocal tricks unless they're part of theatre. Mostly I prefer to let the song tell its own story.
One problem I've never overcome is using both ranges in one song. If I record myself singing harmony with myself it sounds like two people who never met before and didn't bother with rehearsing.
Eerie effect.
Cheers, Joy