the simulacrum clone is a level drained version of the mage, so it has fewer spell slots.
but even if is inferior to the pi clone as spell caster, less spells, less effective level depending spells, has its own advantages.
he can perform physical attacks, does not freeze the original spell caster and is immune to true sight, even if dispell magic kills both. and the 2 clones can exist at the same time, while in EE the trick to have more than one pi is now impossible.
my problem with the ee version of the simulacrum is the way he loose spells compared to the original caster. in the original game the order you memorize spells before resting allow you, knowing how much spells the simulacrum has, to have complete control on the spells the simulacrum has, as he will loose the spells that are memorized last.
in ee this is no more possible, the game engine decide which spells are lost, possibly there is a set priority so some spells that the developers and not the player have set that make the clone "forget" some type of spells and keep others independently by the order that they were memorized. this probably happens cause in the original game at the moment you select the spells to memorize they respect the order you chose them, ie is possible to select 2 magic missiles, then a protection from evil and last other mm, so if the clone can cast 3 lev 1 spells will have 2 mm and 1 pfe loosing the other mm. in ee all the mm will be put in the ui next to each other so the clone will have all mm but will not be able to cast pfe.
this imo greatly nerf the usefulness of the simulacrum spell, ie with a simulacrum that can cast only a lev 9 spell i can no more choose if to have it able to cast an improved alacrity to spam the lower level spells, on which i also have no more complete control, or a planetar or a spellstrike. i get a simulacrum able to do what the engine decide.
so here is the poll.