both ram is 4gb but
i7 8550U mx130 play Far cry 4 got 0-60fps avr: 54
lag spikes , stuttering 24/7
avr fps more than i5 7200U 940mx just 3 fps
but
i5 7200U 940mx play Far cry 4 got 39-60fps avr 51
smooth no lag spikes or stuttering
and on every game the i7 mx130 one got more than i5 940mx one...