We are listing all the basic differences in Water heater geyser of Racold & Havells.

You can read the difference highlighted in bold. This difference is for features offered in storage models. For instant geyser model you need to check the specific model for each list.

Racold GeyserHavells Water Heater
Titanium enamel coating steel inner tankGlass coated welded superior steel inner tank
Special Anode Rod for rust protectionAnode Rod for rust protection
Titanium coated Heating elementIncoloy 800 element with glass coating
2 yr comprehensive
2-4 yr heating element(depending on model)
5-7 yr tank warranty (depending on model)
2 yr comprehensive
4 yr heating element
7 yr tank warranty
Free Installation + pay extra water pipeFree Installation + free water pipe
Verdict: We recommend Havells Water Heater Geyser for their extra glass coated heating element & inner tank with extra warranty for peace of mind.
Havells Instanio 3L Instant Water Heater(Geyser)| Temp. Sensing LED Indicator| Rust & Shock Proof Body| ISI Marked|With Flexible Pipes|Warranty: 5 year on Inner Tank| High Rise Compatible (White Blue)
Havells Instanio 3L Instant Water Heater(Geyser)| Temp. Sensing LED Indicator| Rust & Shock Proof Body| ISI Marked|With Flexible Pipes|Warranty: 5 year on Inner Tank| High Rise Compatible (White Blue)
Outer Body: Rust and shock proof ABS outer body for long life; Inner Tank: Stainless steel inner tank of 304 grade
₹ 5,870 ₹ 3,650
Havells Instanio Prime 25 L Storage Water Heater(Geyser)|Color Changing Temp. Sensing LED Indicator|Glass Coated Anti Rust Tank| Warranty:7 Year on Tank|Free Installation With Flexi Pipes(White Blue)
Havells Instanio Prime 25 L Storage Water Heater(Geyser)|Color Changing Temp. Sensing LED Indicator|Glass Coated Anti Rust Tank| Warranty:7 Year on Tank|Free Installation With Flexi Pipes(White Blue)
Colour-changing LEDs that change from blue to amber to indicate the hotness of the water; Heavy Duty Heating Element for high performance & Quick heating
₹ 19,690 ₹ 8,499
Standard Calor 5 Litre Instant Water Geyser 3000 Watts | Stainless Steel Tank | Rust Proof Body | Automatic Cut Off, 2 Year Comprehensive Warranty (White) By Havells
Standard Calor 5 Litre Instant Water Geyser 3000 Watts | Stainless Steel Tank | Rust Proof Body | Automatic Cut Off, 2 Year Comprehensive Warranty (White) By Havells
Stainless Steel Tank: Ultra Thick & Superior Grade SS Tank; High Precision Pre-Calibrated Thermostat
₹ 5,780 ₹ 3,399

Both Havells and Racold are reliable brands with pan India service and support network.