I prefer speed strips or even loops, with one speedloader.
The speedloader is faster for most folks for a FULL RELOAD. If you shoot dry and need a reload, this is way to do it.
But I was trained (Reserve LE) long ago to use every lull in firing to do a tactical reload of your revolver, and RETAIN ALL AMMO for use. If possible fire two, reload two UNDER COVER, fire two, reload two, etc. This process is relatively quick with loops or speed strips and virtually impossible with speed loaders unless you dump good rounds on the ground or in your hand (now what?) and reload all six (five, or seven) at once.
This tactical reload keeps your revolver "topped off" if things ever really go south and provides maximum firepower at any given moment if you are rushed. We were a long way from backup, and the ammo we had with us was likely to be all there would be, so dumping rounds on the ground was not a wise thing in most circumstances.
Although the defensive nature of ccw response is somewhat different, I still find this technique useful. After the initial go-round, if still in the fight I want to move to hard cover and reload, or break off the engagement. If I cannot leave safely, then I want to be ready to continue the fight until the advesaries are unable or unwilling to continue and/or persue.
I prefer my Glock 21 and a BUG, over a snub revolver only, but occaisionally the snub is all that can be toted along. I still practice these revolver skills for use when the BUG or the snub is what I have to continue the fight.