That's interesting as both schools are fully accredited by NLNAC.
From Excelsior "The Excelsior College School of Nursing was designated a 2011-2016 NLN Center of Excellence in Nursing Education
by the National League for Nursing (NLN). Our nursing degree programs are accredited by the National League for Nursing Accrediting Commission (NLNAC)"
The Indiana State University BSN programs have been NLNAC accredited continuously since 1969 (over 40 years)
There are many state schools that are not NLNAC accredited. NLNAC is a highly respected academic accreditation. Granted both programs are not accepted for initial licensure in all states due to various state and BoN regulations.
Then again not all traditional brick-and-mortar, state BoN approved schools are accepted in every state. For example programs in many schools in the US are perfectly acceptable for initial licensure in their home state and thus appropriately approved by the Board of Nursing. But may not be accepted for endorsement or initial licensure by other states. Georgia comes to mind as one as they require more clinical hours than many other states, so someone who graduated from a school in say, PA with an AAS or direct BSN with 1000 hours (arbitrary number) of clinical experience may be required to secure additional experience before being granted a license in GA because the BoN requires a minimum of 1400 clinical hours (again random, arbitrary number)