They will both be fine and powerful enough for what you want to do.
I dont know what specialist software you need, but surely not that power demanding?
Memory helps it multitask better. 8 should be fine.
SSD= fayser but they seem standard.
Processor - speed of calculations, but an i3 should be plenty unless you are doing soemthing processor intensive.
More likely you should consider weight, battery life and screen size. Go to an Apple shop and just compare the weight and phsyical size. Obviously for portability lighter is better, smaller soemtimes better, but get one that suits you.
Dont forget your discount from the appleshop as a student or extra years guarantee from John Lewis.