@buzd
If the crema is in a plastic container, it's inferior. You want the stuff that comes in plastic bags.
https://ethnojunkie.com/?p=14203
Flavor notes: Among the four, Salvadoran was rich, salt level just right, and a little sweet (my fave if you must know); Mexican was saltiest; Honduran was salty and a little more acidic, perhaps with barely a hint of cheesiness; and Guatemalan was less tart/tangy than the others. In general, the Central American versions were a bit nuttier and richer than their Mexican counterparts.