These are single needle holder, both from Japan. They all have good quality and efficiancy. I would like to use holder when I work with single needle, as a woolfelting artist you work hours and hours, needle holder can release the uncomfortable pain.
Compare to Hamanaka, Clover covers 2/3 parts of the needle so the front shows shorter than Hamanaka. Therefore I use different needle types for each. In general I use triangular needle(fine one) for Hamanaka and star needle for Clover.
It’s my using opinion infact, you can do whatever you like.