So the list in the link is:
Leonidas, Godiva, Neuhaus, Bruyerre, Cote d'Or, Corne Port Royal, Wittamer, Pierre Marcolini, Belvas, Mary, Zabar.
I only know myself the underlined ones. So I will not speak to the others.
Côte d'Or is big volume chocolate found in most supermarkets, but of surprisingly good quality. Especially for chocolate bars. (they do not really have pralines). They are the main staple in every household. And if it is just a simple piece of chocolate you want, you cannot go wrong. They do not quite fit in the rest of the list, because most of the others are praliniers (make pralines out of chocolate) while Côte d'Or is mainly making chocolate tablets.
Leonidas is probably the entry level on Belgian chocolate pralines. Prevalent in all cities, not very high quality, but not bad. It's what tourists usually buy.
Godiva is marginally better than Leonidas I would say.
The top three in Belgian chocolate praline making are for me: Neuhaus, Wittamer and Pierre Marcolini. The first of this three is my own favourite. The original inventors of the praline, they still have wonderful chocolates, not too fancy but amazing quality. Some, who like a bit more specialty flavours will crown Pierre Marcolini to be the king. Wittamer is more in the style of Neuhaus, and I have a little less experience with, just because I always go for Neuhaus.