What is the fine-grained topic of the following text: According to their testing (via MacRumors), the organization has given their recommendation for the iPhone X, but have stated that consumers who wish to save money should opt for the iPhone 8 or 8 Plus instead because not only are these phones cheaper, but they are also cite the battery life and durability as an issue. Only return the topic.
Comparison and recommendation of iPhone X and iPhone 8/8 Plus.