Yes there is a slight difference as I have owned an Aspire 1.5 M/T 2013 and now I'm using Aspire 1.5 M/T 2017
Aspire 1.5 after 2015 comes with ECO Mode which engages itself when you are are keeping a light foot and maintaining the speed. Once you press the accelerator the ECO sign goes off.
The real difference in consumption to be honest is very less, however on the ODO,
Within City
- 2013 gives 11 to 13 kmpl (if driven economically)
- 2017 gives 14 to 15 kmpl (if driven economically)
On Highways
- 2013 gives around 14/14.5
- 2017 gives around 15.5/16
Do keep in mind that these figures can only be achieved if you drive with an extremely light foot. As soon as you press the pedal, 1.5 will start drinking petrol.
If you are worried about fuel consumption then go for 1.3, its the best there is in terms of economy.