Applications in the new Office for Mac 2016 (a/k/a version 15) look just like their Windows counterparts, not like one-off versions or even like native OS X applications. This makes it easier for you to switch between the two platforms.
If you subscribe to Office 365, you have access to the new Mac versions right now. If not, you’ll need to wait for September for the Office applications to be released with a regular purchase license, rather than by subscription.
Here’s a screen shot of Excel 2016 for Mac: