actually, I haven't ever used Mascara X or N -- which I should probably do in the future sometime at work. But I've used all the others, both on myself and on customers. How do you want your lashes to look? You have a lot of options.
Liz I want to try Fibre Rich but I've heard that it is clumpy!! Does have an intense black color because the last mascara I've bought, Estee Lauder's XL in Black, it was more brown than black!! I hate that in a mascara!!