Side-by-side mattress testing · 144+ comparisons published
Updated May 2026
Category
Amerisleep AS4
Sonu Sleep System
Comfort
9.5/10
9.2/10
Support
8.5/10
8.5/10
Cooling
8.8/10
8/10
Edge Support
8.2/10
7.5/10
Motion Isolation
9.2/10
8.3/10
Durability
8.8/10
8.8/10
Value
8.7/10
8/10
Quick Specs Comparison
Spec
Amerisleep AS4
Sonu Sleep System
Price (Queen)
$1,499
$1,349
Type
Hybrid
Hybrid
Firmness
4/10
5/10
Height
12"
12"
Trial
100 nights
180 nights
Warranty
20 years
Lifetime
Shipping
Free shipping
Free shipping
Key Advantages
Why Choose Amerisleep AS4
- Outstanding pressure relief for side sleepers
- Deep contouring at shoulders and hips eliminates pressure points
- Excellent motion isolation — ideal for couples
Why Choose Sonu Sleep System
- Patented Comfort Channel eliminates shoulder and arm pressure for side sleepers
- Includes custom support pillows designed to work with the mattress
- 180-night trial period gives ample time to adjust