What is the difference between Welds and WeldConstraints?

So I making destroyable models, and I found that the best way to do this is to select all the parts and then click Create New Weld. However, I noticed that this creates WeldConstraints instead of Welds, and I was wondering if I should run a script to change then into Welds. I mean, what's the difference between the two? Which one should I use?

A Weld Constraint attaches two parts together, and keeps their CFrames relative to each other (if you move one, the other moves the same amount), with welds, if you try to move one of the parts, it destroys the weld