Interesting, I always thought Ansco 120 is considered the warmer low contrast developer while Ansco 130 is a neutral cooler tone developer.
So, because I wasn't sure I checked Steve ANchell's Darkroom Cookbook and they are listed as "low contrast developer:" Ansco 120 soft working paper developer"
Ansco 130 is listed with Neutral developers.
Of course all developers will vary with paper types and dilution ratios.
We do a class in the summer which consists of using about 15 different developers and /or ratios with a large variety of papers, THe number of papers vary with the interest of the student. I have run all most every brand of paper with these developers and they are similar but not the same. All will make an acceptable print. The difference are sutle and if an individual can not tell the difference it is not critical;; however there may be a situation when one wants a certain look or feeling to a print and then the combination of paper and developer can help bring about that vision.
I am not recommending a "flavor of the month" attitude ; just that we have a lot of tools that can effectively enhance our work.
Oh yes, I don't use Dektol ; Have been using LPD for years as the standard with neurtal or cold tone papers, Zonal Pro Warmtone developer for warmtone papers, ANsco 130 (usually straight) for Bergger Silver Supreme.
One interesting result of the testing procedures was the discovery that Super Platinum was warmer on warm tone papers than Afga Neutra warmtone developer. Of course all these results are influence by our working environment and results may vary from lab to lab and water content, etc, etc.