[2LZ]

The China builders don't have "year/model" so much like the Japanese (or anyone else). It wouldn't surprise me in the least of some Brozz came in with rear drum/regular forks and later in the year, some came in with rear disk and USD forks. There's not a ton of consistency and they assemble with what they have at the time.....or at least that's how it worked a few years ago. I can't imagine that's changed much.

Most bikes share so many parts because the builders (Bashan, Lifan, Loncin, Haosan, etc..) don't make most of the parts themselves. They buy them from other China manufacturers who make certain parts and then assemble, much like how HD can make a bunch of versions of basically the same bike.

It_not_a_honda, to shop for a China bike, it's not picking a brand vastly different from each other like Honda and BMW. They (Honda clones) are too much alike. What you do is pick the bike that has the items you prefer.
Disk or drum brakes...
Regular or USD forks....
Counter balanced or non-counterbalanced....
Rack or no rack....
Size and type of tire and rim to match your riding needs....
An important one....can you register the bike in your state?

My only advise would be to steer clear of an "old world" China bike. The motors were good but the rest of the bikes left little to be desired. That said, it's tough to go wrong with any "new world" Bashan, Haosan, Zong or especially SSR.