Side-by-side mattress testing · 144+ comparisons published
Updated May 2026
Category
King Koil Xtended Life
Beautyrest Black
Comfort
8.4/10
9.1/10
Support
9.2/10
9.3/10
Cooling
8.3/10
9/10
Edge Support
9.1/10
9.4/10
Motion Isolation
8.4/10
8.7/10
Durability
9.3/10
9.2/10
Value
8.2/10
8.4/10
Quick Specs Comparison
Spec
King Koil Xtended Life
Beautyrest Black
Price (Queen)
$2,549
$2,199
Type
Hybrid
Hybrid
Firmness
7/10
6.5/10
Height
14 inches
14 inches
Trial
120 nights
100 nights
Warranty
10 years
10 years
Shipping
Free shipping through most dealers
Free white glove delivery
Key Advantages
Why Choose King Koil Xtended Life
- Excellent support for heavier sleepers and couples over 400 lb combined
- Best edge support in the King Koil lineup
- High-density foams resist body impressions
Why Choose Beautyrest Black
- Exceptional build quality
- Advanced T3 Pocketed Coil system
- BlackICE cooling technology