Here, let me get it through your head.
Example:
Cyndaquil A:
255 EVs in Speed
255 EVs in S.Attack
Evolves at level 36 so, I'll just give it a random stat. +50 speed for example.
Now level it to 40 and it'll have Y stats.
Cyndaquil B:
255 EVs in Speed
255 EVs in S.Attack
Evolves at level 40. +50 speed.
When it evolves, you won't be able to get anymore EV REGARDLESS once its maxed out. And even if you can gain more EV, it wouldn't matter since you were able to gain it as a CYNDAQUIL from the first place. That's why I said EV should not be taken into account when looking at stats comparing pokemons that evolve at a later level and normal level.
So in the end, its the same thing. Do you not understand? Is my english not proficient enough for you to read?