I have no idea

hence the reason for asking!
My thought was that Anti-Freeze (as per the name) protects against cold.
Coolant (as per the name) cools/protects against heat...
Obviously this logic doesn't apply to anti-freeze / coolant?
If there are the same ... then why are they being sold as seperate products by the likes of Halfords...? Does not make sense to me.
Anyway, I take it that as you said they are the same thing.