Either should be perfectly good in all honesty - there isn't really much between any newish hatchback with a lower end petrol engine - particularly if you aren't too fussed about how chuckable it is.
Have a look at both and see what you think, the ford will be a bit cheaper to service and is a little bit better in terms of boot space etc. The mileage is a non issue, being a little newer cant hurt though. Id say I personally preferred the interior of the corolla although its a little dark in the cabin in general.