Whirlpool is AO Smith-manufactured under a brand licensing arrangement. AO Smith Signature is sold under AO Smith\'s own brand. Same factories, same engineering. Different positioning:
| Whirlpool NU122 | Whirlpool Energy Smart NU161 | AO Smith Signature Select | AO Smith Signature Premier | |
|---|---|---|---|---|
| Tank warranty | 6 years | 9 years | 9 years | 12 years |
| Typical price (50-gal gas) | $649-849 | $899-1,099 | $849-1,049 | $949-1,249 |
Hybrid comparison
Whirlpool UE6T-H Hybrid is older platform than current AO Smith Voltex:
- Voltex (current): 3.45 UEF
- UE6T-H (older): 2.8-3.0 UEF
Both have 10-year warranty. Voltex is the current platform.
When Whirlpool wins
- Brand recognition from other Whirlpool appliances
- Energy Smart 9-year warranty at slightly lower price than Signature Select
- Standard NU122 budget pricing
- Discounted UE6T-H Hybrid at Lowe\'s
When AO Smith Signature wins
- Signature Premier 12-year warranty (no Whirlpool equivalent)
- Current Voltex Hybrid platform (3.45 UEF)
- Plumber-channel distribution if you prefer that channel
- Premium trim and badging
Bottom line
Same factory product at slightly different price/warranty tiers. Whirlpool Energy Smart vs Signature Select is nearly identical; choose by price + brand preference. For 12-year warranty, only Signature Premier delivers.