Hmm, the 25w Soldering Iron from RS was exactly what I used, and it worked ok for me! Maybe I just prefer something not so hot cuz I'm something of a soldering n00b
I can't tell from the pics but are the second type you posted different from the Switchcraft type? That first one looks nice but you gotta have your cable prep'd JUST right to get that on without overheating the adjacent wire.
And yes the second connector is the same as a switchcraft in the way they are (where the shield crimps onto the cable). Way easier to work with. I can see why the pain in the ass ones are better (those crimped ones are more likely to yank out and fuck your contacts up, although since these are studio cables they are not really gonna be abused to bad).