Mrtennis, I am not familiar enough with various solders to comment on their relative efficacy. The opinion I proposed on crimping is something I have read a number of times over the years, most recently, in an interview with a person at WBT.
The WBT person was describing their new NextGen connectors which use a minimum of metal. This seems to be a new development or trend in connectors. I note that the currently popular Eichmann bullet plugs also use a minimum of metal.
Anyway, the WBT person said that crimping is preferred to soldering. I don't recall the specific reason at the moment. However, the newer connectors which use a minimum of metal cannot be crimped without damaging them, so they have to be soldered. The conclusion I would draw from that is that the benefits of minimum metal outweigh the benefits of crimping over soldering.