Side-by-side mattress testing · 144+ comparisons published
Updated May 2026
Category
Zinus Green Tea Memory Foam
Spa Sensations Serenity 8" Memory Foam
Comfort
8/10
7.5/10
Support
7.8/10
7/10
Cooling
7.5/10
6.8/10
Edge Support
7/10
5.5/10
Motion Isolation
8.5/10
8.5/10
Durability
7.8/10
6.8/10
Value
9.8/10
9.5/10
Quick Specs Comparison
Spec
Zinus Green Tea Memory Foam
Spa Sensations Serenity 8" Memory Foam
Price (Queen)
$299
$180
Type
Memory Foam
Memory Foam
Firmness
5.5/10
5.5/10
Height
12 inches
8 inches
Trial
100 nights
90 days (Walmart)
Warranty
10 years
10 years
Shipping
Free shipping
Free shipping
Key Advantages
Why Choose Zinus Green Tea Memory Foam
- Incredible value under $300
- Green tea-infused for freshness
- Good pressure relief
Why Choose Spa Sensations Serenity 8" Memory Foam
- Incredibly affordable — $180 for a queen
- Over 27,000 reviews with 4.4-star average
- Green tea and charcoal infused for freshness