Never heard of Echlin coils. Motorcraft coils have puked out on me in the past. However, they do look identical to Globals Coils which are GAMMA's. I've been purchasing GAMMA's from Global since 2005 and haven't one go bad yet, - that's right, not even one.
I haven't tried Uneek or Echlin.
IMO, you can get a bad or a weak coil from any supplier. What you want to pay for them is up to you. In my case, I use the Global coils (GAMMA's) and get the 10 packs , just in case. Been lucky so far.
Personally, I think the best you can do is Global coils w/Granitelli connectors. I don't like cheap boots and connectors.
BTW - sam, no I wasn't singling you out.