On the Walmart Discover Card they specifically Say Transunion FICO score. I'll be the Experian score is a FAKO and so not really worth having, IMHO.
It is a FAKO.
Its an Experian PLUS score. I think any US Bank credit card will give you access to it. Both my Platinum, and my Cash Rewards cards have that link.
They send you via a special web link to Experian, where you login and are given the score.