Actually, neither.
Starting Score: 504
Current Score: EQ FICO 819, TU08 775, EX "Who Knows?" Quizzle 756
Goal Score: All Scores 760+, Newest goal 800+
Take the myFICO Fitness Challenge
They aren't used by lenders, hence what's the point in the score?
I'll give you an example why. With the Transrisk on CK, you only get AAoA for open accounts. So, say you have been paying a mortgage off for 30 years. As soon as you pay it off, that positive TL is gone, you get no credit for it whatsoever.
With FICO, you will still get that positive TL for another 10 years, adding to your AAoA and strengthening your CR.
So, is it not prudent to show that information to a potential creditor?
Starting Score: 504Current Score: EQ FICO 819, TU08 775, EX "Who Knows?" Quizzle 756
Goal Score: All Scores 760+, Newest goal 800+
Take the myFICO Fitness Challenge
Not to counterpoint what Shogun is saying but if your goal is to repair your credit, then most FAKOs will serve that purpose. Just find one (like Credit Karma) that you will check over and over as you make repairs to your credit. Something that will allow you to check your progress.
If you're looking for a measuring stick for credit approval, then stick to what Shogun said.
And I totally agree with you on that. I use CK myself, and I use it like you said, to monitor for changes. I was just referring to the scores. 
Starting Score: 504Current Score: EQ FICO 819, TU08 775, EX "Who Knows?" Quizzle 756
Goal Score: All Scores 760+, Newest goal 800+
Take the myFICO Fitness Challenge
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