My impulse would be to attribute this to user base. Many people who buy a $300 speedlight-sized studio light are using them for weddings/events and are not known for treating their gear gently, nor are the conditions particularly gentle. I have the 200 and am shocked/amused by stories people have of damaging them in transit, but then I pad them well, in a hard case, and I've never had a light stand fall over because I've had presence of mind to prepare for a reasonably safe set, and put extra money into my stands knowing I should. But of course, my line of work allows for it, whereas some shooters aren't as fortunate.
Coming at this from another angle, I will say the 200 performs more closely to the 360 II as opposed to the original 360. This suggests to me that their build tolerances got better, and the 200 benefitted from it.
The faulty battery story with the 360's power pack is now... 4 years old IIRC.
RDKirk wrote in post #18671770
I'm wondering if there isn't a build quality difference between the AD200 and the higher models, particularly the Pro line. I'm hearing a continuous trickle of issues with AD200 flashes. It might be a matter of greater error or mistreatment by users ("After I dropped it, it doesn't work right. Anyone else with that problem?")--or the Pro line might be a better manufactured product.