I wasn't particularly crazy about this end cap. It wasn't easily flexible - not a perfect fit to my 2mm satin cord although it did fit for the most part - just not perfect. The smooth exterior made the glue look a little sloppy. I would go for the better one.
I bought these end caps to finish off satin cord (rattail) ends. Since the ends were going to be visible, I wanted something a little nicer looking - these are perfect! I put a little super glue on the ends of the cord and a drop in the crimp end, gave a little squeeze on the crimps and it turned out great!
I have been using these ends to finish Silversilk 3mm capture chain. I use a dab of E6000 for good measure, and I will never have to worry about these ends falling off.