Why was our garlic butter made in France, much nicer than garlic butter in England? We're stumped so we thought we'd come and ask the experts.

Last weekend we were in Paris, and bought what we think was normal unsalted butter (from a marche franprix) and (again as far as we are aware) normal garlic. 

We melted the butter on a low heat, cut up 2/3 cloves of garlic, put them in the butter, left it to simmer for 3/4 mins and out came lovely tasting Garlic butter with a strong (but not overpowering) Garlic flavour, almost slightly salty - very similar to Pizza Express Garlic butter if you have ever had that. 

We fell in love with the stuff so as soon as we got home bought some garlic and unsalted butter from a UK supermarket. Worked through the same process and it was naff.

There's no strong garlic flavor, the butter looks very yellow and has a strong buttery flavour.

Does anyone know why there would be such a difference? A quick google shows no difference between French &amp; English garlic or butter.

P.s. in Paris we repeated the process 3/4 times so it wasn't a one off fluke
The UK supermarkets have the opinion that British people like milder garlic, so most of the garlic you find in the UK supermarkets, even organic garlics, are of a very mild variety. Also, they are bred for yield, in softer soils, so they produce bigger bulbs but less strong. 

Garlic found in most French and Italian stores is much stronger, as that is what people demand. It is usually hardneck, rather than softneck garlic, and hardnecks tend to be much stronger. French garlic is usually grown in stronger soils, so it produces a stronger flavor. 

My solution is to grow my own, 3 bulbs planted usually yields a years' worth of garlic for me, and because I have clay soil it has a strong flavor. It's by far the easiest and most rewarding thing I've ever grown. 

If that's not your cup of tea then ask a greengrocer to stock a stronger variety of garlic, or order it from an Isle of Wight supplier. Of course, you could just use about 4 times as much to get more flavor.