West systems has the same pump tops for their epoxy. It really makes things easier.
For my etex I bought some bottles at the craft store 3 for $3 and have the pointed top with little cap. The caps actually fit on the etex bottle or if I have the big etex kit I just pour into the smaller bottles.
With West systems the pump is a measured pump. Meaning one pump from one and one from the other and they are equal