So... essentially the same right? Not to suggest that there isn't some perceived audio differences between the examples but one probably shouldn't come to a wholesale conclusion that one make/brand of these aka's are for sure more powerful or better sounding than another. As I've suggested before, unless we tested these side/side when they were released 35 years ago, there's no telling what effect wear and tear has on individual examples. For what it's worth, every person who's purchased a JVC M70 slider rebuild service has told me (when they provided feedback) that the boombox sounded far better than before the service. If they had multiple examples in their collection, it would end up being the best sounding one. On the other hand, gsbmr has so many that it would be hard to discount in this case,right? 

caution said:The only difference between a Clairtone and a Japanese Conion is an extra antenna wire from the tuner board to the rear screws.
The transformers are both dual voltage. Most likely they were built in the same factory. Even the PCBs say Conion on them, although some have different revisions.
Almost forgot - there are a few parts missing on the Clairtone version but I have no way to know if those variations also exist in the Conions. A few 100uF caps on the amp circuit are missing and a number of components for the metal position of the tape type selector are also missing.