Yes, that's always been the case for as long as I remember. Spain and Luxembourg are quite cheaper for Petrol than any other European country I've been in.
15 or 20 years ago the difference was bigger still.
I think between 1.45 and 1.49€ per liter of 95 octane depending on gas stations. I've given up caring except it's usually a little cheaper on weekends.
So, poll is closed and my GS is the winner this month, quite happy with that.
If the picture on the vote is a good one for the banner, use that @XTreme, otherwise I´ll send a couple more for you to try.