I must admit I've not driven both of them, because there is no Infiniti dealer near my home. But I have done extensive research on both, and own a TL. I've also driven the Type S.The interior of a TL is hard to beat in this price range. It is bristling with awesome technology including bluetooth, voice commands, navigation (one of the best out there). It has about 30 more horsepower than a regular TL and better suspension and brakes.I agree with the other review, I think the Infiniti is supposed to handle a little better (being rear wheel drive) and has more power. The TL has more toys and a little more luxury to it. Although honestly I think the Infiniti looks a little nicer.I doubt you would go far wrong with either vehicle, both are good value, both have luxury features, and both are going to impress most drivers with their performance.To me these vehicles are so close, you are just going to have to drive them both and feel what seems right to you. I doubt either would disappoint.If you are willing to lose some of the technology, you might want to look at a similarly priced BMW 335i. It's going to be very fast and out perform both vehicles in the handling department. I also think it looks better, and is such a blast to drive.
www.edmunds.com