Completely agree with DTG
Any car is a compromise. The Corolla is a general purpose commuter econobox.
Indeed it might be the the wrong choice if your driving involve mostly highway at 80 mph and money is no object.
(Although 32 mpg at 80 isn't that bad).
Diesel are great in those conditions : compact diesels are rated around 30-46. If your drive is mostly city, go hybrid (around 50-46).
Both involved a few to several thousands price premium over a Corolla (plus diesel and urea cost for the first ones).
That fact alone could put a serious dent in the fuel economy factor.
You don't chose a car only on expected mpg, as it varies considerably under each different driver's foot.
The CLA250, for instance is rated at 26-38, but Car and driver couldn't get any better than 25...(as for the Corolla by the way !)
Disappointment over mpg would only make other aspects of the car neglected at buying more unbearable.
You shouldn't only buy a "monthly price" either (yet so many do !) : What about deposit, resale or residual value and, with some luxury brands, cost of maintenance (not to mention reliability).
Couldn't be happier with my LE Eco. Some offers were a tad more quiet or comfortable. A regular LE would have cost slightly less.
But none of those offered a lower price for the equipment I wanted and other aspects of the car were OK, if not stellar.
I didn't even considered the alleged superior mpg (30-42 vs 29-37 for LE), knowing that it is all relative.
Yet, for my style/needs of driving (no 80 limits where I live), it ended up giving me 30-50+.