Go for the 1.8 one, at least the S-LED edition. It has LED projector headlamps with built-in HIDs and headlight washers not present in the S-package one.
However, do not waste your money on a tampered vehicle, buy from a reliable source or get it imported yourself because most of the Prius available at showrooms are major accidental un-graded vehicles which will cause great troubles in future.
Do not buy a vehicle without getting its Auction Sheet verified from Japan, and if the sheet is not provided, leave the car no matter how good it looks.
I am myself using a 2010 S-Touring edition bought from one of very few reliable importers @sharabhi and believe me, the car speaks for itself.
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