Since this is a preview thread...have you seen the videos at You Tube? I 'm mistaken or they changed the sims' voices? I could be wrong since my game will arrive next month
The voices are probably different. They're not using all the same voice artists, for example. Gerri Lawlor, who used to do one of the female voices in TS2 was actually voice director for TS3 and she did not do any voices for TS3 because she was directing. Also, keep in mind that there are now sliders to change the pitch of a sim's voice (saw this in a preview video). So even if the original speech was recorded by the same voice artists as from TS2, people are probably playing with the sliders and changing voice pitch. So of course even if the voice was done by the same person it may sound different from sim to sim when the player adjusts the pitch.