I use all 3, as far as telling the difference you should be able to tell by the bark. It won't matter unless you were trying to smoke it with just 1 wood type to experiment with flavor.
Team: [B]Smitty's Real Pit BBQ[/B]
[B]Superior SS-3[/B] - Courtesy of Gainesville Jaycees and Superior Smokers
Custom Built Reverse Flow Stickburner
[B]Weber[/B] 22.5" WSM
[B]Weber[/B] 26.75" OTG
[B]Weber[/B] Blue 2000 Stainless Performer
[B]Weber[/B] Red 1998 Stainless Performer