Well, there is a slight difference. There are no paperwork formalities or licensed furniture dealer required if the insurer wants to take the fire damaged item to extract salvage value
You underscore why I was more concerned about the thickness of the steel on my safe than fire resistance.
The tricky part of a firearms claim is value. The insurer will no doubt look at national market value, and it will be an uphill fight to capture the "pre-ban" premium on EBRs and mags in MA that sets a "MA market value" that is often well in excess of what insurers will find dealers listing the product for or, in some cases, even MSRP.