I think that will not work ,we are dealing whit big lizards whit big egos and its alredy troublesome to keep two of the same species in one vivarium. But wait for Varanio
I would definatley not keep them both together. Albigs get to about 6 foot in length and are twice the girth of a savannah. Also even when young albigs grow significantly faster that savs in that respect, and juvenile albig, might find a juvie sav as a tasty treat.
Have you kept savs before? I'd set it up like a sav enclosure but maybe with more stout logs/branches for climbing; they're a bit more arboreal than savs but still mostly ground animals. Deep substrate for burrowing, I've used cypress mulch, dirt, and cypress/dirt mixtures.