I downloaded the two manuals and they look basically the same although interestingly the DW-1410 says,' the operational procedures for modules 1414 and 1410 are identical.' So, there are 3 modules that are very similar.
Maybe the 1414 was just an update with some different parts in it or something ?
For example, the 901 and 691 modules in vintage G's are identical apart from a different size battery.
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