The 2+16GB and 4+64GB specifications refer to the amount of storage and RAM memory available on the smart TV box. A 2+16GB box would have 2GB of RAM and 16GB of internal storage, while a 4+64GB box would have 4GB of RAM and 64GB of internal storage.
Having more RAM memory allows the device to run apps and multitask more smoothly, while having more internal storage allows you to download and store more content and apps on the device. If you plan on using your smart TV box for gaming, 4+64GB would be a better option to ensure smooth performance and sufficient storage space.
When choosing a smart TV box, consider your usage needs and preferences to determine which storage and RAM configuration would best suit your streaming and gaming requirements.