Here are the big differences between these two Alexa speakers
Echo Pop review: Alexa on a budget
Echo Pop vs Echo Dot: Which should you choose?
Echo Dot vs. Echo Pop: Which one should you buy? - Reviewed
Echo Pop vs Echo Dot: Which should you choose?
Echo Dot (4th gen) review: The new Dot delivers a revamped look and (slightly) better sound
Echo Pop vs. Echo Dot: Which speaker should you buy?
Echo Pop review: Alexa for less - The Verge
Echo Pop Review: a cuter, smaller Alexa
Echo Dot vs. Echo Pop: Which one should you buy? - Reviewed