The designer of Apple’s old Happy Mac icon for Macintoshes and of lots of other graphics for Mac, Susan Kare, took the stand yesterday in Apple’s lawsuit with Samsung. The trial began last Monday and Susan is one of Apple’s key witnesses that can bring valuable information and that can make the case a victory.

Susan’s testify brought into the open the similarities between Apple and Samsung’s devices and she stressed out that she barely saw a difference between an iPhone 4S and a Galaxy S3. Just before the trial, Susan accidentally picked up a Samsung device that she mistaken for an iPhone.

”I think of myself as someone who’s pretty granular about looking at graphics, and I mistook one for the other. So I guess in addition to my formal analysis, I had the experience of being confused.”

Kare also noted that the icons on Samsung devices infringe in many ways Apple’s icons. Samsung’s attorney, Charles Verheoven, opened during the trial a Samsung smartphone and an iPhone and told Kare that users should be able to make a difference by the logos and sound. Kare retorted that the difference should stand in the look and feel of the operating systems and not in their functionality.

Read more about Susan Kare’s testimony at the courtroom on CNET.

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