Why? On what do you base your statement? Do you know any details about the materials or fittings of the Mekko bags?
This is the first that I've heard of Mekko. So, no. I do not know anything about the
m.
I do, however, know about the Domke bags. I have three of various ages - the oldest is over 30 years old and has not failed in any way. The canvas is all soft now and a little dirty but, it has no rips , tears nor even any loose threads.
Domke bags are made in the USA, backed by a (lifetime?) warranty and widely available at local shops and on-line.
The Domke bags are extremely good and well worth the money.
You can get a genuine Domke F2 for around $120 and it'll last a lifetime.