Data from two years for comparison

I have data from two different years. I want to compare and see if they are same or different what is the best method in SPSS I should use.
Depends on the whether the variable to compare is

1) continuous, binary, ordinal or nominal,
2) normally distributed in each year or not,
3) sampled for the same subjects in the two years or different subjects.
Thank you,
The data is from life satisfaction survey, with 1 being least satisfied and 100 is highly satisfied. I have data sets from 2016 and 2017 from different subjects.
I'm not sure if its normally distributed or not. Any help would be appreciated.