For What It's worth...
When an electrician installed our outside outlet for us last year, he asked if we planned to use anything with an electric motor, i.e. an electric lawn mower? He said that a homeowner's GFCI kept burning out requiring several replacements until he finally asked what the homeowner was using that outlet for (an electric lawn mower). The electrician claimed that he then upgraded the GFCI and it never burned out subsequently. So from this conversation there must be some difference in the quality and sensitivity of a more expensive and robust GFCI outlet.
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