The different part numbers are for the different diameter wire that goes into them.
You will be able to crimp them anyway.
You could just go with 1.0mm-2.5mm and it will be grand.
Cant really see the pin from that picture.
I suggest you remove one from your connector,push on the little tab and it should pull out,and take pics of it
and take pics of the dde where that connectors goes.
Also look at the first thread in this section,you can get connectors off farnell.