AO Smith Water Heater vs Havells Geyser which is better?

Both offers 8 bar pressure Glass coated water tank with 7 year warranty
Both offers glass coated heating element but Havells offer 4 years warranty on heating element while AO smith offers 3 year warranty on heating element.
Both offers ipx4 water protection and temperature control knob
Both offer 2 year comprehensive warranty
Havells offer free installation and water pipes too
Service support of AO Smith is considered better than Havells.
If opting for instant geyser then go for AO Smith, for storage models both Havells & AO Smith are same though Havells offer free installation and water pipes.
All difference are marked in bold above.
Few models of both Havells and AO smith are given below to help you decide.

Havells Water Heating Geyser Deals	AO Smith Water Heating Geyser Deals
Havells Instanio Prime 25 Litre Storage Water Heater \| Color Changing LED Ring Indicator, Feroglas Coated Tank \| Warra: 5 Year on Tank, Protective Anode Rod, Heavy Duty Heating Element \| (White Blue) ₹ 19,690 ₹ 8,642 view on amazon Havells Instanio 3 Litre Instant Water Heater \| Color Changing LED Indicator, Rust & Shook Proof \| SS Tank, ISI Certified, Warranty: 5 year on Inner Container ; 2 year comprehensive \| (White Blue) ₹ 5,870 ₹ 3,650 view on amazon Havells Instanio Prime 15 Litre Storage Water Heater\| Color Changing LED Ring Indicator, Feroglas Coated Tank\| Warra: 5 Year on Tank, Protective Anode Rod, Heavy Duty Heating Element \| (White Mustard) ₹ 16,290 ₹ 8,051 view on amazon Havells Standard Calor 5 Litre Instant Water Geyser 3000 Watts \| Stainless Steel Tank \| Rust Proof Body \| Automatic Cut Off, 2 Year Comprehensive Warranty (White) ₹ 5,780 ₹ 3,399 view on amazon