Rampant Lions in European Heraldry

[OC Richard]

In looking at items with a Lion Rampant motif, I notice that there are various forms of lions.

This image showing a number of European lions has used the same style of lion for most of the Rampant Lions, save for the crowns, weapons, and double tails that some have.



But here each is given a different style of lion.



So does each country have a distinct style of Rampant Lion?

Or in Heraldry if it says "Lion Rampant" are you free to use any style of rampant lion you wish?