Although I have yet to hike the JMT I have hiked the TYT in the Sierras, but I live in Maine. And I just spent the long weekend in the Nahmakanta unit, which is adjacent to the 100MW.
Remember folks, this is a commonly used term for this stretch, but it is not federally set aside Wilderness. There’s your difference.
You will encounter lots of water in the form of remote ponds with nary a building on them, and streams and brooks running free. It will be rocky, it will be very rooty, even little climbs like up Nesuntabunt that I did Sunday mid-day will surprise you in its ferocity. Then arriving at lovely Crescent Pond, capped off by traversing above Pollywog Stream on your way to Rainbow Stream.
It’s still beautiful wild country, with yes a few logging roads - one of which I used and paid a nice fee to drive on to access the area I hiked, as it is private land.
It’s still a gem and I’m proud that it’s in my state and accessible. I’ll be @ Abol Bridge starting mid-July as the MATC ridgerunner in the area, you will no doubt walk through here or use the Golden Rd as a shuttle access to the northern end of your hike, depending on whether you chose to then enter BSP and climb Katahdin. It’s a damn impressive mountain when viewed along that route, rising out of the lake country.
Have a great hike, it’s the classic East vs West coast hiking experience. As always, September is the month.
Bluebearee