Was not even aware of Warman until seeing them on this thread. Where they are made might have a bearing on quality as I think Dimarzios might still be made in USA.
1st used the Dimarzio mini switch about 10-12 years ago when splitting a double rail single coil sized bridge PUP on a strat. It is actually now in the middle position on my Son's strat. A few years ago bought some more double rails to put in neck and middle and also bought cheap eBay mini switches and it all turned out crap as you could hardly pick any difference to the sound when flicking through the 3 switch positions. Problem solved once 2 more Dimarzios arrived but those PUP's were rubbish too hence why that axe now has proper humbuckers and set up in a H-S-H configuration.
Some of the out of phase sounds (position 2 & 4 on a 5 way switch) between middle and PUP's either side are very thin and low in volume and sound best with all coils at their hottest setting for when you want to have 2 PUP's on together.