Hi,
the difference is as follows
The normal version only contains the base game. So when you buy that, only the base game will be added to your Origin account.
If you buy the Starter pack, you'll get the base game, the late night expansion pack + the High-End Loft Stuff Stuff pack + Some Store content (bit unsure which one atm, think it's Date Night).
All three games will be added to your Origin account and you'll get a code to redeem for the Store Set.
The Starter Pack is the far better deal.
I don't know about the 1 GB vs 7 GB. If you could link that other thread, I might know what they mean.
