Same weapon, different country of manufacture. Also could be Pakistans
Anza MKI. SA-7's are pretty much SA-7's. Don't know why I went with the Chinese version, maybe I just had China on the brain that day.
Shoulder launched SAM's were desinged to fill in the gap between the small arms envelope and the vehicle or base mounted SAM's envelope. While traditional AAA (20+mm guns spewing a million rounds a second into the air) are pretty cool, lack the kind of mobility needed in a fast paced battlefield environment. AAA also has quite the supply train. Things like SA-7's and Stingers are highly mobile, require almost no maitenance, and cost less than a few minutes worth of AAA fire, not to mention the training aspect.
As far as Irans SA-7's being better than anyone elses, quite possible. No matter where its made, an SA-7 is still an SA-7, the difference is in the bells and whistles.