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

Both start as wood pulp dissolved into fiber. Bamboo viscose typically uses a more chemical-intensive process and is usually labeled 'rayon/viscose derived from bamboo.' Eucalyptus Tencel lyocell uses a closed-loop solvent process that reviewers and brands cite as more environmentally controlled. In feel, subreddit consensus is that lyocell tends to be slightly thinner, drapier, and more durable across washes, while bamboo viscose feels plusher out of the bag but can pill or thin faster.