I think the pale blue ones you are on about might be the ones from Socom Tactical, X-plode they are called.
I bought 5 of the Mk5's and 1 smoke from Socom Tactical to give them a go as they are cheap.
1:5 of the Mk5's failed to go off, even when the fuse was held in a flame. 4:5 went off but the burn times and volume were wildly different. The smoke went off, its small and it didn't burn for a massively long time.
My thoughts on the Enola pyro, I haven't set off the ring pull smokes yet, they are bigger and fit nicely in 40mm grenade pouches. They seem to produce a good thick smoke screen and are pretty robust, there is a good cap on them that is pretty secure. The Mk5's have been a bit sh!t though. They seem to go off fine, the burn time is pretty consistent as is the volume, I haven't had a failure yet in about 4 of them. But of the 10 many have lost the strike cap from the top, they aren't glued on very well to the point I have had to reglue many and carry one cap in my pocket just incase. I've also had to put tape around the join between the cap and main body as they are breaking here as well.
One of the guys in the team bulk buys TLSFX and we can get them off him. They seem pretty bomb proof and he swears by them, he's been through a good couple of hundred and won't use anything else.