Read the following passage and answer the question that follows:

For many consumers on the hunt for a new desktop or laptop PC, one of the biggest considerations is the type of processor the system should have. Two of the CPU families most often in contention in mainstream systems are the Intel Core i5 and the Intel Core i7. And that makes picking tricky because the two lines have a lot in common.

The differences among Intel's key processor families are clearer when you're looking at the Core i3 (found mainly in budget systems) or the Core i9 (powerful CPUs for content creation and other high-performance scenarios). The differences between the Core i5 and the Core i7 can seem subtle and more nuanced, especially when the prices for a Core i5 versus a Core i7 PC can sometimes be so close.

There isn't always a clear-cut, definitive answer to which is better in a given situation, and often, it just comes down to your budget. But knowing the essentials about each can help you make a smarter choice. It's difficult to find the key difference between i7 and i5.