I am comparing drow with human. (drow starts with 16 con, 20 cha)
Drow get 3 more cha (possibly 2 more dc ) and 1 more enchantment dc (+6 ehchant saves )
human get more 2 more con (30hp), 1 feat (greater focus of 1 school)? 3 more skill points in every level.
1 feat is compensated by the enchantment dc, 2 more con cant match with 3 more cha. And with 10 int and +4 tomes, drows will have 66 skill points, enough to maximize spellcraft and concentration (46 ranks), 14 ranks in umd, 2 in heal/perform/tumble each.
I am thinking probably drow will be a better choice.