I am going to do something unheard of and claim the the jetpack implementation is better. setting dimensions of the image is vital,adding external images (for all kind of "ads") is very important for such a widget, and if it is external you need to configure title and caption.

Didn't try the widget yet, but it seems a big omission that you can not configure some user defined url as a target for an associated link.

The only thing jetpack is lacking is the ability to select from the media library (and not handling responsiveness, but I haven't heard of almost anyone that does it)