Congratulations on both your offers...

What does your partner do and what are his prospects in both areas? Is he going to find it easier to find work in one rather than the other?

I understand that leeds is a very expensive place to live now and the cost of living might be considerably less in sheffield. I have been told that sheffield is a nice place ... lots of recent developments and the city is very up and coming.

if it were me, i would be looking at cost of living and partners job prospects. after all, he will be main earner for three years.