conch??

[knickle22]

I have a dsb and currently have a few nassarius snail (only like 5 small ones). They are doing an alright job at keeping some areas clean but i am in need of more. Problem is i dont like there "webs" all over the place and am looking to get a conch instead.
Question is are all conch species generally the same?
I mostly reed about the "fighting conch" but i most local stores have other types like spider and orange-lip. I am just wondering if the are all the same or if curtain species are better than others.
Thanks for any info