ILX is previous gen Civic platform, so there's that.
That being said, I absolutely loved my ILX. I changed cars 3 months ago simply to get an automatic transmission, and decided to give GTI a try. I cross shopped against new ILX with its DCT, and even though I didn't buy it, I liked it quite a bit.
At that price point, in a 3 year lease, how could any of them be a bad deal? I have to think the ILX is a more base car than the others, but even a base car today is damn good.
I'd think a huge consideration would be, what's the support mechanism? How are the dealers to deal with when warranty issues arise?