Looking at the front of the finder, the letters HP appear below and just to the right of the Nikon name.
EDIT, add'l info:
I don't think the image is dimmer on the HP finder, but it is smaller, so it and the exposure info can be seen with the eye up to 25mm (1 inch) from the eyepiece. I like it because I wear glasses, but otherwise I'd rather use the standard finder for the extra magnification. The HP has 75% magnification; the standard finder has 80% magnification, which is a noticeable difference. Even with glasses the standard (DE-2) finder is pretty good. The standard finder is a little more compact, and in my opinion, looks better.