Age old discussion I know but MM or MC? Benefits?


Some mighty long discussions on this already here but I need a refresher!
Having decided to upgrage my phono amp to a Dynavector p75 mk3 I am now wondering about my cartridge.
At present I have a Clearaudio Emotion 4 table with a Clearaudio Artist v2 cartridge.
What are main difference between mm and mc that I could expect to actually hear?
And lomc and homc? What is all that about?
Sorry if this has been thrashed to death already but just trying to get a laymans understanding if possible.
128x128uberwaltz
Oh yes, it is much better to overfill with the oil than underfill. One bottle is good for five times, I think. It is recommended to change the oil once a year if you play it a lot and every 18 months if you don't. Besides getting small metal particles in it, oil gets consumed, burnt.
lohanimal, What was "different" about the MMC series of cartridges from B&O?  I think of them as "not MC" (MM or MI without having done any research).  I ask this out of genuine ignorance.  I own an MMC2.  Thanks.
@uberwaltz , I just replaced a Soundsmith Zephyr MKII High Output MI with a Lyra Delos (MC). The Delos is still breaking in, however, I cannot understate what an impact this has had already on my system. I would say, to my ears, I've almost doubled the sound quality. It sounds as though a veil has been lifted, the highs are sweet and not muddled and I've gained additional separation of air and instruments has.
@asp307 
Yes I have heard many good reports on the Lyra Delos, much as there should be bearing in mind the cost.
Hopefully I will be pretty happy with the new Nottingham table and Shelter cart for a while before I bankrupt myself...lol
If you do not mind sourcing, you can find some great deals. I bought my brand new Lyra Delos for $300 less than what I paid for my brand new Soundsmith Zephyr MKII. 

I've heard of but have never heard Nottingham and Shelter gear but I hope it's exactly what you are looking for! Good luck.