Help me choose the right one pls

I'm choosing between the acer aspire s3 and s5. Here are the link for those two
S5: http://www.amazon.co.uk/Acer-13-3-inch-Ultrabook-Integr...

S3: http://www.amazon.co.uk/Acer-Aspire-S3-391-13-3-inch-Ul...

Basically, from what i can see, the only difference between those two are the s3 has hdd, while the s5 has ssd. I actually prefer to have a 500gb storage ( which the s3 offer), but i'm not really sure if the s5 is still superior than the s3 in other aspect. So which one should i go for ? Thank you in advance.