Warranty or Quit Claim

my wife and i are registered bidders at the local county auction that is held monthly at the court house. my wife purchased a vacant lot at a tax sale, and somehow the recorded sheriff’s deed was sent to us under both our names. there are no liens on the property as the lot was purchased directly from the sheriff’s sale and/or directly conveyed from the county sheriff’s office. in wanting to keep her and my purchases separate, can i provide her with a quit claim deed or should i use the more formal warranty deed.