Tata Tiago has a long list of differences between it's base and the topmost variant. The base variant of Tiago (XB) comes without air conditioner whereas XE and XM skips the music player. They even come without reverse parking sensors and day/night IRVM. The XT variant comes loaded with these features while adding more like body colored equipment to the package. These 3 variants are offered with optional dual airbags, except the XB variant. The XZ variant comes with ABS, EBD, CSC, cooled glove box and many more advanced features for a pleasant riding experience.   Infographic Source: https://autos.maxabout.com/cars/tata/tiago