"More flow = more suspended particulates being trapped at the filter" is misleading...it should be "more suspended particles being trapped at the filter, for a given length of time'. More will not be trapped in total, they'll just be trapped quicker...after a while, you'll be filtering crystal clear water with either setup.
Two filters, you'll get clearer water faster and, if one fails, you might not have to come home to a tank of departed fish. I wish I could run two, but I have a wet dry...those pumps are pricey.
I say use two if you can afford the $2.50 or something extra for your power bill.
My apologies, Nomel mkes good point . My post was a little misleading.
Two filters will trap and hold more than one. Two filters also = more flow.
The most important medication in your fish medicine cabinet is.. Clean water.