I've noticed quite a strong resemblance in these two tartans, Armstrong and Davidson.

I ask because I might be getting a new kilt for my son, and he really wants to wear Davidson like mom (sash) and dad (USAK Semi in Ancient Davidson). Sportkilt doesn't carry Davidson, but Armstrong is very, very similar from everything that I've seen. Considering most kid kilts are acrylic, in black watch or stewart variants - and he outgrew his first one in a year, I am not looking for anything special, hence the Sportkilt.