Grand Deed vs Quit Claim in California

[Alvin Uy]

Doing a joint venture flip for the first time.  My partner is going to add me on to title after she closes on the house.   It going to be her and my SCorp on title.   Im wondering how to best take title... Grand Deed vs Quit  Claim???    By the way, she got a loan on this property with title insurance.   I know some folks recommend Warranty Deeds so it doesn't void title insurance but Warranty Deeds are not available in California...   I know Quit Claim is fairly common.  Can someone please chime in?