What the difference between each bolt action rifles?

I want to know what makes each bolt action rifle unique in its own way, namely WW1 and WW2 bolt action rifles. I did some research on those rifle but I could not find the simple answer.

Here is the list of rifles I want to know the special features:
Kar 98k
Mosin Nagant
Carcano
Mannlicher
Lee Enfield
Springfield