TRI zol vs. Tri reagent

[trixietang]

Is there any published information about the differences between TRI zol by invitrogen and Tri reagent by sigma?

[CharonY]

I would be surprised if there were reproducible differences worth publishing, as both are essentially the same method (with probably minor tweaks in detail). I assume that differences in yield are more likely to vary more from extraction to extraction (or experimentator) rather than between reagents used.