My deck has 10,000 hand-made cards and I know for sure they stick in my brain easier than cards from a premade deck that I have no connection with. I suspect it depends how you make the deck. I intentionally use sentences and images that I care about.
It only matters for the first few reviews though, even a premade card can be forced into my mind with enough effort.
It only matters for the first few reviews though, even a premade card can be forced into my mind with enough effort.