I think the merit here lies in the field quality... Whether you have 10,000 players or 1,000cap, shouldnt make too much of a difference, should it?
If 20% of the field are paid, its 2000 from the first and 200 for the second.. The only difference being (and pokerstars
likes to make it quite top heavy) that for a good run in the larger field will lead to a greater ROI.
I might have missed the point here, but at lower stakes you can be a winning (consistently ITM) player just by playing simple poker, there are lots of fish you can extract value from.
FYI, my bread and butter is the fifty50 SNG's which i find to be the easiest and generally softest fields.