Hey mate, I have one of those too, but I notice a few differences about the woods, in mine, the body is of a lighter shade, and the wood veins are much more dense, it's also very heavy (14Kg), the maple neck is a bit weird as the wood kind of looks like a burl, and the fretboard is flamed.
I absolutely love it, it isn't my main bass, that one is another Harley Benton, the PB-50, but the JB-75 nat is a peach! I got it as a "deko" item, payed 45€ at the time, I think, and it has no faults except a scratch in the G string tuning key.
I just have one advice, you should redo the ground and shielding, I also changed the pots and jack in mine, but the overall difference wasn't that notorius. Oh and the pickups, last month I swaped them in a trade for a pair of J's that came in an American Standard Fender Jazz, a deal which I regret as I think the Wilks sounded better, at least they were more balanced, this set has a very poor mid and high ranges, I'll swap them for a set of Malagoli Custom 60 when I can.
Great buy, congratulations!