This site:
http://www.xalmat.com/eqsummoners.co...s-library.html
Has some very extensive information on all the different pets and shows the difference in level/hp/damage for pets summoned with sol ro focus items and with the Staff of Elemental Masterys. Unfortunately it seems to be from a time after they removed the pet level variance, since for example focused 49 pets range from lvl 40-44 here, but it lists them at 42 on that site. Nonetheless, it does highlight the difference in effect between the types of focus items and does so with specific numbers.