New Laptop Acer 5738 or 5738Z

Dear Everybody

I have two options here, I wana buy a new laptop, Acer Aspire 5738 fits in my budget very well. But it has two models

Aspire 5738 and Aspire 5738Z

5738Z comes with Intel Dual core processor but 5738 comes with Core 2 Duo processor, both these have a price difference of 300 Saudi Riyal. 5738 comes in 2200 SR

Remaining everything (hardware specification) is same. I am confused whether go for 5738 or 5738Z. Is there some difference in processor ? Dual core and Core 2 Duo. While I checked on google, people say both are double core processors.