Rankings are essentially meaningless marketing fluff, and even academics just ignore them. 'Higher entry requirements' are not going to tell you if you will like being at that Uni or enjoy the course anymore than the other one.
So - instead, you need to look at both courses in detail in order to work out which one interests you the most, ie. which optional units would you actually choose to do if you went there. Are there any opportunities for a work placement or study abroad - these add enormously to your graduate CV. You also need to think about the offer grades and what you might achieve in August, and which of these Unis you would still be happy to go to if your Firm choice rejects you.