It seems to me that it is easier to remember spells from scrolls when your head isn't as full. So remembering bigger spells first and smaller spells afterwards works better than remembering small spells first and larger spells afterwards. Ni testing but I do it often enought o be reasonably sure.
What I haven't worked out is what determines the success of remembering from a scroll. ma.sp.sp or ma.it.sc would be my guess but I have no idea which if either of these is right. Special 325, scroll 317 and still struggle with bigger spells like bep, dkdd and pfga