I have doubts about which of the university rankings is more reliable in terms of academic reputation, because there are notable differences in ranking for the same universities across different portals.
For example, if I consider a university X, I will find the following results:
a) QS World University Rankings (QS): no results
b) Academic Ranking of World Universities (ARWU), result: 601-700 Note: Here I am confused, its rank is 601 or 700?
c) Times Higher Education (THE Ranking), result: 801-1000; the same as before, its ranking is 801 or 1000?
d) Scimago Institutions Rankings (SIR), result: 669.
so which rank should I consider?
Thanks