Google has what it calls a “creative lab,” a group that had originally worked on advertising to promote its brand. More recently, the lab has been asked to supply a design vision to the engineering and user-experience groups that work on all of Google’s products. Chris L. Wiggins, the lab’s creative director, whose own background is in advertising, describes design as a collaborative process among groups “with really fruitful back-and-forth.”

“There’s only one Steve Jobs, and he’s a genius,” says Mr. Wiggins. “But it’s important to distinguish that we’re discussing the design of Web applications, not hardware or desktop software. And for that we take a different approach to design than Apple,” he says. Google, he says, utilizes the Web to pull feedback from users and make constant improvements.

Mr. Wiggins’s argument that Apple’s apples should not be compared to Google’s oranges does not explain, however, why Apple’s smartphone software gets much higher marks than Google’s.

GOOGLE’S ability to attract and retain design talent has not been helped by the departure of designers who felt their expertise was not fully appreciated. “Google is an engineering company, and as a researcher or designer, it’s very difficult to have your voice heard at a strategic level,” writes Paul Adams on his blog, “Think Outside In.” Mr. Adams was a senior user-experience researcher at Google until last year; he is now at Facebook.

Douglas Bowman is another example. He was hired as Google’s first visual designer in 2006, when the company was already seven years old. “Seven years is a long time to run a company without a classically trained designer,” he wrote in his blog Stopdesign in 2009. He complained that there was no one at or near the helm of Google who “thoroughly understands the principles and elements of design” “I had a recent debate over whether a border should be 3, 4 or 5 pixels wide,” Mr. Bowman wrote, adding, “I can’t operate in an environment like that.” His post was titled, “Goodbye, Google.”

Mr. Bowman’s departure spurred other designers with experience at either Google or Apple to comment on differences between the two companies. Mr. Gruber, at his Daring Fireball blog, concisely summarized one account under the headline “Apple Is a Design Company With Engineers; Google Is an Engineering Company With Designers.”

In May, Google, ever the engineering company, showed an unwillingness to notice design expertise when it tried to recruit Pablo Villalba Villar, the chief executive of Teambox, an online project management company. Mr. Villalba later wrote that he had no intention of leaving Teambox and cooperated to experience Google’s hiring process for himself. He tried to call attention to his main expertise in user interaction and product design. But he said that what the recruiter wanted to know was his mastery of 14 programming languages.