Deionised water vs distilled for coolant?

Deionised is cheaper. A fair bit so it seems.

Does it really matter which of these you're opting for? I've read mixed info on it from either is fine to deionised isn't great but then those articles seem to follow up with basically it should be fine with antifreeze mixed in, which anyone with sense would do anyway.

Already done one car. Turns out I used deionised. Just picked as it was the cheapest stuff. Didn't realise what it was at the time. This car will likely be getting sold anyway. Got the other car to do now. I'm going to guess it doesn't really matter but before I buy anything I'd just like some views on it.