What's the difference between bamboo viscose and eucalyptus Tencel lyocell sheets?

Both are plant-derived rayon fibers spun into soft, breathable fabric. Bamboo viscose (sometimes labeled rayon from bamboo) is typically the most affordable and is praised by verified-purchase reviewers for a silky, drapey feel. Eucalyptus Tencel lyocell is made in a more closed-loop process and is frequently marketed for cooling and moisture-wicking. In practice many shoppers find the two hard to tell apart by touch; the bigger differentiators tend to be weave, finishing quality, and price.