Current MEC P/J pickups

[HowlinDawg]

Maybe some of the more knowledgeable members could answer a question for me on the current range of MEC pickups.
I've searched online but can't find the answer.

I can see three, maybe four different types of P/J pickups on the current range.

There's the
1] Passive MEC "Dynamic Correction" P/J (plastic cover with silver text)
2] Active MEC P/J from the Rockbass NT 1 (plastic cover with Gold text)
3] Active MEC P/J from the Pro Series (plastic cover with Gold text)
4] Active MEC P/J Metal cover

Questions:
Are 2 & 3 the same pickups?
Is there any difference between 3 and 4 other than the covers?

 

[schlobodan]

there is only 2 types of pickups 2-4 should be the same

 

[HowlinDawg]

Thanks @schlobodan , that's very useful to know and wasn't clear from the MEC catalog.