system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are mobile phones processors weaker than desktop processors even though on the spec sheet they look the same? (e.g. Snapdragon 801 vs. Intel Core i5-3210M)
gpt
Phone processors have a smaller instruction set, meaning it takes them longer to complete the same task even though they are running at the same clock speed.

Cache sizes are also smaller, when the cache runs out it will be slowed down by the slower access times of memory vs the very fast access time the cache has.