Which statement below is incorrect as to why you would use one over the other?

You have been using T2 instances as your CPU requirements have not been that intensive.

However you now start to think about larger instance types and start looking at M1 and M3 instances. You are a little confused as to the differences between them as they both seem to have the same ratio of CPU and memory.

Which statement below is incorrect as to why you would use one over the other?
A . M3 instances are less expensive than M1 instances.
B . M3 instances are configured with more swap memory than M1 instances.
C . M3 instances provide better, more consistent performance that M1 instances for most use-cases.
D . M3 instances also offer SSD-based instance storage that delivers higher I/O performance.

Answer: B

Explanation:

Amazon EC2 allows you to set up and configure everything about your instances from your operating system up to your applications. An Amazon Machine Image (AMI) is simply a packaged-up environment that includes all the necessary bits to set up and boot your instance.

M1 and M3 Standard instances have the same ratio of CPU and memory, some reasons below as to why you would use one over the other.

M3 instances provide better, more consistent performance that M1 instances for most use-cases.

M3 instances also offer SSD-based instance storage that delivers higher I/O performance.

M3 instances are also less expensive than M1 instances. Due to these reasons, we recommend M3 for applications that require general purpose instances with a balance of compute, memory, and network resources.

However, if you need more disk storage than what is provided in M3 instances, you may still find M1 instances useful for running your applications.

Reference: https://aws.amazon.com/ec2/faqs/