The sites in MA are all parks run by the National Park Service.

Many get different formal titles - "national battlefield", "national historic site", "national parkway". Some people get loudly obsessed that there is some special , well defined process that gets a park the title "National Park" (there isn't, it is a political decision).

For example, the St. Louis arch, basically a city park, is titled "Gateway Arch National Park", and presumably that makes it super-special and more important than Minuteman National Historic Park (/s). Though to be fair, it is true that many of the parks titled "National Park" are amongst the more interesting NPS nature parks.

There are no national parks with that title "XXX National Park" in MA. They have formal names like "XXX National Historic Park" or "YYY National Seashore", but (again) they are all "national park units" run by the same National Park Service.

Of course, YMMV on how much that formal title matters.