Are Skirting and Architrave the same profile?

Yes, every profile code can be used. The only difference is that the architrave typically will be of a smaller height when compared to the skirting of the same profile. For example, SK498 is a skirting and an architrave, but the latter will be smaller (66mm, 90mm, or 115 mm), while the former can have a height of up to 285mm.