Yes, this is the fourth Chibi America in this book.

No, they're not the same, they're all different. I checked, but feel free.

The first has his human name and a wink.
The second has a gun and a scratch on his cheek.
The third has a burger, a gun in a holster, said USA and had his flag.
This one has a gun, a hamburger, a donut, candy and stars in the background.

And No, this is not the last one because Yes, I have more.

Yes, it's slightly sad I have this much Chibi America.