My recollection, bound to be wrong and misleading, is that sometimes adding "Bluegrass" to a model name changed a spec - perhaps at the level of "Adirondack spruce" vs, "spruce" but sometimes not. Someone who knows the years and models better than I do can tell me I am full of nonsense.
That said, the internet is full of sellers who describe Guild guitars differently than Guild described them at time of manufacture and full of Guild catalogs that have specs that are wrong, incomplete, inconsistent or were never made. So depending on what you want to know your best bet is to focus on the label (which is more likely to be correct) to determine "exact" model or post pictures and folks will tell you what we think you have and why we think that.
Feel free to browse at https://www.gad.net/Blog/guild-guitar-catalogs/ while awaiting a real answer :-)