You cannot test a point condensor with a ohm meter... Sure you might see a needle flick to show it can hold a charge, or you might even have a fancy model that shows you capacitance, but you cannot test it under load. A points condensor tester applies a few hundred volts to the capacitor and checks for breakdown/leakage.And yes.. you need to use the same mfd...
Same with a coil that fails under load. Your meter will show the correct resistance, but it's only a fraction of a volt so insulation breakdown will not occur.