So first of all, they are very different degrees, on one side you have Chemical engineering which is mostly involved in the scale up of chemical reaction, focusing on efficiency and etc. for MSE your focusing on the development of new materials for things such as aerospace, drug delivery, using drug delivery etc. I would suggest focus on what you want to get out of the degree and what type of work you want to do. ChemEng is much harder as a degree (they are both engineering so they will be difficult) as the math involved is more complex. I've done more looking into ChemEng so the good unis are like Oxbridge (obviously) Imperial, nottingham, manchester, loughborough, for chemical engineers the type of companies that will hire you could be like coca cola, P&G, shell, BP. Im sure the salary for materials is decent probably from the 30s-50s early on but I know that Chemical Engineers range from 30-60 with a much higher earning potential