There are differences between different albino crosses. Albino pastels have a lot of blushing and very deep yellow, albino black pastels have incredible contrast, and albino mojaves have the deepest yellow along the spine with lighter yellow and yellow flames along the sides. In short, you can still see a lot of the pastel, black pastel, mojave... characteristics in the albino versions, just a lot for subtle.
As for the pastel spider lucy, Im not sure how you would tell. I guess if one of the parents had super pastel in it you could say for 100% the lucy was a pastel. Not sure about the spider though.