This isn't a ratio of one part in 10^38; it's an absolute difference between the particles' masses of 1x10^-38 grams. The ratio implied depends on the mass of e

This isn't a ratio of one part in 10^38; it's an absolute difference between the particles' masses of 1x10^-38 grams. The ratio implied depends on the mass of each particle. I presume this is far less than a gram, which means the radio is also far less.