Help Predicting EX FICO Score Increase?

[ccb2115]

Because I don't have access to my EX FICO scores, I have to make an educated guess as to how much my score has increased after getting some derogs removed. 

Last month, my EX FICO score (provided by AMEX) was 626. 

Since then, I have had a collection removed, a 30 day late payment removed, and an AU Amex (99') (perfect payment history) tradeline added to the report. Moreover, another month of 1% util will be reporting in a few days. 

Does anyone want to help me with an educated guess, since I don't really know what EX FICO weighs heavily on since I was never able to pull it frequently when it was provided. Do you think it will it be around 650ish, 680ish, 695ish? 

My other two reports that are reporting the same information are...

EQ: 695

TU: 682 (reporting 31% util from AMEX) 

I read somewhere that EX and EQ FICO scores are sometimes very similar. 

[RobertEG]

Too many unknown variables to even offer a guess, such as how old was the 30-late, how many other serious derogs still remain other than the collection, how old is the new AU account, what is its %  util, etc., etc.

Best guess is to rely upon the statement by Fair Isaac  that the versions of the algorithms licensed by the CRAs should, with identical credit file data for each, not vary by more than approx 20 pts between the CRAs.  And of course, the data in the files of each CRA are rarely identical.

[ccb2115]

Robert, first I must say that you've been so helpful!!! I think you've answered almost all of my questions the last couple of days! You are so awesome! Thanks!

1. 30 day late is from April 2011

2. There is one serious Derog on all of my credit reports which is a paid CO from 2008

3. The new AU account is an AMEX account from 99. Before that my oldest account was from 06.

4. Util is 1%