New Adsense Formats

Google is changing the look of Adsense ads.

Google's new format for Adsense ads looks much cleaner thanthe old format. Although the actual ads are till the same the look is still different.

According to the quote below, the fonts are the same, but I think there is a difference between them. If you look at the display URLs they seem a bit smaller in the new style. It is a little hard to tell since they did not use the same ads in the comparison.

I noticed that the Google logo is now at the bottom right away.

If you do not use a border, the ads will resemble normal links a little more. Readers will not have the "Ads by Google" staring them in the face at the top of the block. Instead it is a bit less noticable at the bottom. This could include CPC a bit-some publishers have tried to hide the logo against Google's TOS. 

After extensive testing and research, we’ve found that the new formats are not only visually appealing to users, but they also perform even better for publishers and advertisers. We're in the process of rolling out this change to all ad units, and you should see that your ad units are automatically updated over the next few days. But, before you rush to make sure all of your ad units still match your site, please be assured that the fonts and colors of your ads won't be changed.

Source: Inside AdSense: A fresh, new look for AdSense ads

So far, I have not seen any difference in the link bars.

They would much more effective if the logo is moved.

I usually do not use borders. The new ads are showing up on my sites already. While the logo is larger, it is less obvious. I like the new look myself.