I ordered 2 sets of Wilde's pickups - Keystones for strat and Microcoil Alnico for strat. I installed both on the same strat ( Fender US Standard). This is my observation:

1. Physically microcoil alnico pickup is lighter by ~30% compared with Keystones.
2. Microcoil sounds closer to my original pickups - US standard strat year 1994, with more clarity. Fender ori pickup is "weak" on bass response especially the low E/ A string.
3. Keystones has a louder output, approx. 20% louder than Microcoils alnico.
4. Through my setup, this is my opinion towards how the 2 sets of pickups response to bass/mid/treble.
Keystones: 8/5/6
Microcoils Alnico: 5/6/7

Personally I prefer Keystones over Microcoils, coz it sounds "warmer" to me and I like that sound. Unfortunately I cannot do a very detailed comparison as the neck pickup on the Microcoils alnico set is faulty, and I'm struggling to get a feedback from Becky despite several emails sent in for query. I will open a thread in this forum and hopefully get some feedback from Becky and staff.