Get this months evo (March) it has the n30, golf gti performance & 308 group test, probably the one you are talking about, they are all 4.5 star cars, summary result, last place golf, easiest to live with. not engaging, 2nd, 308, most entertaining of the 3, lightest, fastest, edgy, looks dull, uses the least fuel, winner i30N proper mature performance car, could do with being lighter, never feels quick.
Whilst they were graded that way, there is apparently not a lot to choose between 'em.
308 hit 100mph a second quicker than the other two despite giving away 400cc
308 looks a great secondhand buy.