Is there a direct relation between the relativistic mass (total energy) and rest mass? In other words, can we say a proton has higher rest mass than an electron because a proton-antiproton annihilation would produce that much more energy than electron-positron one? And the ratio of energy content of these two annihilations will be the same as respective ratios of their rest masses? Judging from http://www.wolframalpha.com/input/?i=proton+electron this is true and the ratio of their MeV/c^2 masses to their kg masses is the same. Then why do we need the Higgs when we know that rest mass is directly proportional to the total energy contained in a particle?