In a head-to-head comparison between the Sweet Zzz Mattress Topper and Avocado Eco Organic Mattress Topper, the decision comes down to individual preferences and budget. While Avocado excels in providing organic, firm support, Sweet Zzz triumphs in delivering plush softness, cooler sleep, longer warranty, and better value for money. Consequently, considering these factors, Sweet Zzz holds an edge in this matchup.