I am not so familiar with Zotero. I tried using Mendeley 3 years ago & I found it so messy. I stuck to endnote which I think is more superior to Mendeley. So I think you should opt for what you're comfortable with.

Asanka Pradeep Gunawardhana

Mendeley is great at extracting metadata from PDFs, but it isn't as good at capturing metadata from other sources. The majority of the metadata from webpages will be imported by Zotero, but you may need to add or update components such as publication date and author.

I am using Mendeley, somehow for me it is good enough user friendly...

https://library.stanford.edu/research/bibliography-management

https://library.si.edu/research/comparison-endnote-zotero-and-mendeley

I use Zotero. I used both, but Zotero has better support and it is closer to my needs. But try both and after few weeks select better for you

Dear Researchers thank you for your priceless

comments and thank you all.

I tried both Mendeley and Endnote, but it depends on your interest. I would say Mendeley is a better option if you don't have a licensed copy of Endnote.