The tires are a different pattern than Stampede tires. The picture is a bit grainy but it appears the wheely bar / rear end is a little different than the Stampede. I'd be willing to bet this truck isn't a copy but retains enough of the elements visually to make you think it's a copy/close but it different enough to avoid legalities.
I've read that Traxxas has a nasty legal team and doesn't mess around with people copying their products and infringing on patents and copyrights so I'm not sure that HK would go down the clone road.
I have to agree with northerngames though - if it is a clone unless it's dirt cheap it doesn't make much sense. The Stampede isn't expensive to begin with, parts are readily available, and I doubt that HK is going to do it any better than Traxxas already has.
OTOH - like Kent said if it's ARTR or RTR brushless and is a bit different than it might be a fun truck to goof off with. Horrid body is almost 100% guaranteed.
