Dear Gunther, what a solid rendition! And to note and count the interesting differences between yours and the box art is a lot of fun also (e.g. Mr Ishii made sure there is a ton of contrast between colour of helment and jacket, pours over the fellow plenty of pink, gloss varnish the whole thing saving the face). Diffrent perspectives bring out totally different effects, and both are sumptious to look at.
I find the back of this bust to be particularly beautiful, and actually says more about Mr Ishii's artistic might (as sculptor) than the front. Would you kindly afford us a peek at how you did the back?
Cheers!