Can someone please explain to me the difference between the two offerings above?

Anytime I decide to buy a new computer from Dell, they ensure I leave frustrated. Why do they have so many confusing models? What is their aim?

All I want is a PC equivalent of the Mac Book . (Around 14”, Long battery life,  2.x GHz processor, 3GB of RAM and over 100 GB hard drive.)  with a budget of 600pounds.

How hard can that be?

In addition to making good products, Apple is successful because they make it easy for you to make a purchase decision. I am sure Dell has more 14 inch Latitude variations than Apple has in products.

This same thing happened some months ago before I got a HP computer which I am not too happy with. I have tried giving Dell a chance again and they have left me frustrated. After this experience, I most certainly will never purchase another Dell product.

I am aware Dell is not a the only culprit, but I am vexed with them because I always go there first.

If you can,  please suggest a laptop that fits the bill of what I am looking for.

A PC equivalent of the Mac Book . (Around 14”, Long battery life (>5hrs),  2.x GHz processor, About 3GB of RAM and over 100 GB hard drive.)  I have a budget of 600pounds/800 dollars.

I will be grateful.