Side-by-side mattress testing · 144+ comparisons published
Updated May 2026
Category
Vispring Devonshire
Sleep Number ComfortNext Lux
Comfort
9.2/10
9/10
Support
9.3/10
9/10
Cooling
9.4/10
8.8/10
Edge Support
9/10
8/10
Motion Isolation
9.1/10
9.3/10
Durability
9.5/10
8.8/10
Value
8.4/10
7.5/10
Quick Specs Comparison
Spec
Vispring Devonshire
Sleep Number ComfortNext Lux
Price (Queen)
$3,950
$3,999
Type
Handcrafted Pocket Spring & Natural Fill
Air Chamber Hybrid
Firmness
6/10
5/10
Height
8.3 inches
13 inches
Trial
Retailer-dependent; typically 60–100 nights
100 nights
Warranty
30-year guarantee (the longest in the industry)
15 years
Shipping
White-glove delivery through authorized retailers
In-home delivery
Key Advantages
Why Choose Vispring Devonshire
- Hand-nested calico pocket springs — the original pocket-spring maker since 1901
- 30-year guarantee is the longest warranty we have ever verified
- British fleece wool comfort layers breathe and regulate temperature naturally
Why Choose Sleep Number ComfortNext Lux
- Superior pressure relief for all major pain points
- 67% more cooling materials than ComfortMode
- Superior airflow engineering