Santorini Park is a good place to visit for shopping and photography. The place is a bit small but quite nice. No vegetarian food is served there. It has place for children to play and walk around. The place has been constructed nicely and staff out there is very very courteous.

Santorini is divided into two parks. One is an amusement park, the other is a water park. Yesterday we visited only the amusement park. We intend to visit the water park soon so will do a separate review of that.
The amusement park costs you 50 baht to enter, which is pretty cheap but entry is all it gives. A lot of thai people seem to go there and wander around taking advantage of the many 'photo op' locations, of which the park has provided many.
Its got a greek/spanish/moroccan feel and is quite clean and nice to walk around.
The amusements range from 120 baht to 480 baht per person to ride, so a family with two kids could rack up quite a hefty bill by the time they have finished. The 120 baht ticket buys you three rotations on the ferris wheel, which I felt was over too quickly.
There are some good food outlets which are not too expensive given it's a tourist trap, and a couple of nice tea / coffee hangouts.
There are plenty of shops inside but the prices are very high by Thailand standards. I liked a tee shirt in the Ed Hardy store but could not justify 2100 baht for a cotton print T-shirt. That's even expensive in my own country currency, especially when I know that these T's are made in Thailand and are purchased from the manufacturers for less than 300 baht.
A number of the rides were not operating which was surprising given that its deep in high season right now.
All in all a pleasant enough experience, if you need to kill a couple of hours.

They are similar. When compared, Santorini Park is better than Venezia in Cha-am/Hua Hin. Both charges you 50Bhat, Santorini Park is bigger than Venezia, more to see - - you can take more photos at the Santorini park, such as, visit the trick art museum (from Korea) at 240 Bhat (if I don't remember wrongly), more restaurants, more shops....