Fire tv stick 4k (standard): features a 1.7 ghz quad-core processor, 2gb of ram, and 8gb of storage. ideal for standard 4k streaming and basic app usage.fire tv stick 4k max: upgraded with a 2.0 ghz quad-core processor, wi-fi 6 (or 6e), and 16gb of storage. this model offers faster app loading and extra space for games or downloaded content.fire tv stick 4k select: an entry-level 4k option running amazon's vega os. it has 1gb of ram and 8gb of storage, which is better suited for light users who primarily use one or two apps