FWIW the only smoke technique I've consistently read won't give you the smoke ring is electric smokers which happen to use wood chips or pellets. Whoever is saying that it's pellets specifically is wrong & is misconstruing what people are talking about as it's more the method than the materials.
I used electric smokers for years with consistent success as far as delicious food always in the absence of a smoke ring though. Nobody who ate my meat (uh huh huh /Butthead) waxed negatively about the lack of a smoke ring. It was always praise on how delicious the pulled pork or brisket was. I used a combination of chips in the tray and pellets in a tube. Great taste, no smoke ring.
Once I started using a pellet smoker I immediately noticed the smoke ring. Flavor isn't incredibly different between the two methods but the smoke ring is present with the pellet pooper. Everything I've read in addition to my personal experience says that the presence or lack thereof of a smoke ring has zero outcome on flavor so IMO it's a non-issue anyway.
tl;dr Choose the method that works best for your budget and application and perfect your technique and ignore the internet haters. Eat what you like.