some pics of both the LX150 and Vespa S 150. Both use the same chassis, wheels, and engine. The differences are in the trim levels and details.
You can think of the LX as the "luxury" model, and the "S" as the sport model
the S, has stripped down solo seat, no glove box, old school dash and square headlight, and sport shocks
the LX has the modern dash, round headlight, and bigger seat
I ride a red Vespa S demo all the time.....love it!!!!
In the pictures, the red is the S, the light blue is a LX150