No expert here either but I just recently found some at a park and put the pics up at the shroomery and they said they were indeed pan. cinctulus.
The easiest way for me to tell the difference was that the stems were a lot stronger and had a red-brown base compared to the white brown flimsy pan. foe stems.
Also the gills on the cinctulus are dark, charcoal grey to blackish and are mottled. The foes will have brown gills. And ya, the prints should be jet black, be careful because the foe prints can LOOK black but aren't truly jet black so you might want to draw on the paper with a sharpie or something.
Oh, and the gills rarely fall below the margin (lowest part of the cap) on cinctulus where foes will often have gills protruding from the bottom of the cap.
I'd say you have foenisecci as well.
'Little spider weaves a wispy web, stumblin' through the woods it catches to my head. She crawls behind my ear and whispers secrets. Dragonfly whiz by and sings now teach it.'