Training Same Enchantment on Multiple Minions (in General)

Consider the following:

Scenario 1:
1 Enchanter - Trained AMF to level 10,000

Scenario 2:
2 Enchanters - Trained AMF to level 5,000 on each (for a total of level 10,000)

What are the advantages/disadvantages for each scenario?

I realize that equipment bonuses would help more (be cheaper in total) in scenario 1, but is there anything else that needs to be considered? I know if this were AS (rather than AMF), than DM would be a bigger problem with scenario 2, but is there any similar problem when using EO?

Thanks for any help.

The EXP stacks, not the levels. In Scenario 2, due to lower EXP costs, you'll have a total level of less than 10,000.

AMF, EC, DM all benefit from being trained on multiple minions, as the xp cost is less to get the same level

Wrong OB, the levels stack.
It is effect that does not stack so 2 level 5k will be the same as a level 10k.
The advantage being that the exp cost is cheaper, the disadvantage being that you take up a spell slot.