Which is better ESL or ELL?

I'm curious to hear your thoughts on the debate between ESL and ELL. In your professional opinion, which approach do you believe is more effective for learners looking to improve their English language skills? Are there any particular advantages or disadvantages to each method that you've noticed in your work with students? Additionally, how do you determine which method to use with individual learners based on their needs and goals? I'd love to hear your insights on this topic.