Remove background does not do a very good job of removing the background that is inside the object compared to other tools out there. Example, would be a bicycle wheel. The tool does a great job removing the background the surround the outside of the wheel, but no so much inside where the spokes are. Even when the backgrounds is uniform in color throughout. Photoshop tends to ignore inside object that contain the same background. This tends to be a manual removal by adding to the mask with the paintbrush. Photoshop should be smarter when it come to backgrounds. Is there a way to get better once lick results as I do with online tool. Here is an example. No other work was done to these images other than clicking remove background. This was done in the Photoshop Beta.
 
 
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