The rates are slightly different - I use the Octopus Compare app to check, and it's consistently cheaper for us to use 'Intelligent' - The main difference is that Octopus control the charging hours for the car, rather than the car itself. I was apprehensive, but it's worked really well for us. For example on Wednesday the car charged from 00:30-12:30, then 01:00-4:00. The day before there was an 'extra' slot put in from 6:30-7:30 which was great as my morning toast and kettle boil went in on the cheap rate!
Here's the compare from yesterday.....