It was a tale of two voice assistants. Amazon and Apple showed during Thursday earnings calls just how far apart they are in the race to build a smarter AI assistant.Apple CEO Tim Cook addressed the delay for the company's much-anticipated Siri upgrade, first announced nearly a year ago as part of Apple Intelligence. "We need more time to complete our work on these features so they meet our high-quality bar," Cook told analysts, adding, "It's just taking a bit longer than we thought".Cook didn't give a sp ...