I looked and couldn't find this posted here before, the article is not mine:   https://gainstaginggeekery.com/2018/03/12/tone-matching-my-fuchs-ods-to-the-line-6-litigator/?fbclid=IwAR0pb3WIEcDK5_SrGy-gC015E6JXh8U6O-FO_MGBq-QAqIZO3Yfi-jrfVw0   IMHO this is one of the best, most useful articles I've ever read about comparing a model to a real amp, and gives you a great idea of the behavior of a modeler vs. the real thing, some of the shortcomings and where the modeler does a g