Didn't see it suggested yet, but maybe try to find a used Peavey PVM520i. I've seen them sell as low as $25. Great mic for bass cab and kick...I'd bet it'd work well on floor tom too.
I was going to say look for a used Peavey PVM520i, but I think even that will run you in the $100 neighborhood. You didn't give a budget but I see the two mics you're considering ar both under $40. If you're limited to that under $50 range, I think I'd try to build...
Nobody has reviewed this product yet. Have an opinion?
PVM 520i Unidirectional Cardioid Neodynamic Microphone Features: -Neodynamic design -Cardioid polar response -Titanium laminate diaphram -Neodymium magnetic -Superior off axis rejection -Low frequency polar response control (below 100 Hz) -Smooth, accurate frequency response -Accurate instrument reproduction -Ultra high sensitivity