Only ever flown from HND. If doing Tokyo again I'd probably look closer at the to/from hotel logistics a bit closer than I did the last time. Whichever offers the most straightforward solution logistically would get my vote. I thoroughly enjoyed the HND lounge, and by the sounds of it NRT / HND are on a par in that regard.
The topic of logistics in Tokyo is an entire thread in itself, there are several, but I wouldn't make my decision based on the choice of 77w / maybe a Dreamliner for the reasons outlined above. No guarantees and in F how bad can either really be?