It looks deliberate but it's also not clear to me which is the "better" version. It doesn't look like one has more features or is obviously newer or better. (i personally like the second screenshot better, but i think the rounded boxes in the first screenshot is actually google's latest design fad)

You can sometimes trigger similar changes in appearance to the search results view by switching to incognito or clearing your cookies - Google often A/B tests or performs slow rollouts of changes like this, a difference in appearance could just be because a new user agent string got you placed into a different release group.