More Padding and Contrast

Comparing to the older control version (A), the new search bar in B gained more padding. This is visible with a taller input field, as well as on the focused state below with the expanded autosuggestion box.

Furthermore, the B search bar also differentiated from the white background with a slightly grey fill. The possible advantage of such a change might be a higher contrast / greater visibility of the input. The counter hypothesis might be that the grey fill risks suggesting inactivity. Because this change was combined with other ones, it's harded to tell whether this had a positive, flat or negative impact.