it's not just the CRA that affects the score but the specific scoring model used. You can't expect two entirely different scoring models to produce the same score even with the same data. Equifax is definitely a FAKO though I don't know which one off the top of my head. Check with Equifax and Quizzle to determine what scoring models they use. Or search existing threads as odds are they have been discussed before.
EDIT: Quizzle's front page indicates that it's a VantageScore and quick Googling turned up this for Equifax:
http://www.equifax.com/equifax-credit-score/
The credit scores provided under the offers described here use the Equifax Credit Score™, which is a proprietary credit model developed by Equifax.
Scoring models are a very common topic around here. Also don't overlook the Understanding FICO Scoring subforum.
