Side-by-side mattress testing · 144+ comparisons published
Updated May 2026
Category
Serta Classic Mattress (Standard)
Novaform ComfortGrande
Comfort
Not lab tested
Not lab tested
Support
Not lab tested
Not lab tested
Cooling
Not lab tested
Not lab tested
Edge Support
Not lab tested
Not lab tested
Motion Isolation
Not lab tested
Not lab tested
Durability
Not lab tested
Not lab tested
Value
8.8/10
9.5/10
Blank cells mean that model has not completed our instrumented lab protocol, so we publish no measured score for it. We never estimate a number we have not recorded.
Quick Specs Comparison
Spec
Serta Classic Mattress (Standard)
Novaform ComfortGrande
Price (Queen)
$499
$449
Type
Innerspring
Memory Foam
Firmness
6.5/10
5.5/10
Height
Varies by comfort level
14 inches
Trial
120 nights
Costco return policy
Warranty
10 years
20 years
Shipping
Free shipping
Free shipping from Costco
Key Advantages
Why Choose Serta Classic Mattress (Standard)
- Lowest price in Serta's current lineup ($499 queen)
- Individually wrapped coils rather than a bonnell unit
- Three-zone lumbar reinforcement
Why Choose Novaform ComfortGrande
- Incredible Costco value
- 14-inch luxury height
- Costco's unlimited return policy