In "Stratigraphic Chart" it is stated (in “Laramie 'Triceratops'” comment) that Carpenter & Young (2002) illustrate DMNH 48617. In fact they illustrated an unnumbered specimen held in Weld Country Court House [WCCH] in Greeley (formerly UCM 41777). DMNH 48617 was illustrated in Glut (2006, p. 531) and Carpenter (2007, fig. 15.5).
Triceratops horridus (or "cf. Triceratops horridus") is in this chart restricted to lower part of middle third of Hell Creek Formation (sensu Scannella et al., 2014), while "Triceratops sp. 1" is present in lower third. This enigmatic "Triceratops sp. 1" may be called simply Torosaurus latus (with "cf." or not), or Triceratops latus, if You want to have it in the same genus.
MOR 1120 is from upper part of Lower Part of Hell Creek Formation, so it is "Triceratops sp. 1", but is better considered as T. horridus. MOR 1120 does have unusual for (non-Torosaurus) Triceratops features: more pronounced anterolateral projection on squamosal than every other Triceratops I am aware of, and 6/7 episquamosales (reported in holotype of T. albertensis - Sternberg, 1949, p. 40). These should be considered minor compared to differences between it and Torosaurus from lower Hell Creek.
Scannella et al., 2014 and this paper are not clear on Triceratops specimens from Laramie and Denver Formations. Are all of these (DMNH 48617, WCCH coll.) older than Triceratops from Hell Creek Formation? There isno mention of Denver Formation in this paper – if it is considered the same as Laramie Formation, it is not stated.
Carpenter, K. (2007) "Bison" alticornis and O.C. Marsh's early views on ceratopsians" [in:] Carpenter, K. (red.) "Horns and beaks: ceratopsian and ornithopod dinosaurs" Indiana University Press, 349-364.
Glut, D.F. (2006) "Dinosaurs: The Encyclopedia. Supplement 4" McFarland & Company
Sternberg, C.M. (1949) "The Edmonton fauna and description of a new Triceratops from the Upper Edmonton member; phylogeny of the Ceratopsidae" National Museum of Canada Bulletin, 113, 33-46.