Silverstone last week. LT vs RS. LFA was meant to be the third contender but the car didn't start, battery issue. So took my CRT instead (massive amount of fun).
In short, my feeling was pretty spot on for the RS. I said it would shine on the track, it was more than that, it was bonkers. I was really amazed at how good it was, yes it's boring on the road because of the auto box and too much grip but on the track, it's a weapon. Really exceptional. It's quite possibly the best trackday car I've ever owned, also because with aids left on, it's easy to drive, my mates had a riot and they don't have my experience.
The LT was sublime but a bit too soft. even on the track settings the car never feels as planted as the RS. It's much faster, it's almost got 200hp more and close to 100kg lighter so no surprise here but it's less dramatic because the noise is not as good as the RS and unlike the RS where the car is alive at high revs, it seems the power band is flat after 7000rpm, surely a consequence of the turbo. The brakes are immense but the pedal feel is too soft for me. The RS brake pedal is better (I have steel brakes). The auto box is better in the LT. The paddles too. I don't like the RS paddles, they are too small and too far inwards of the steering wheel.
It was early days for both cars though the RS only had 900km on the clock and the LT was brand new so they will losen up. Next track day early April.
One other thing is grip level, much higher on the RS, again no surprised here, aero + mechanical grip. The rear tyres on the RS are 325 which makes for great traction. That would explain why despite the weight and power deficit, I reckon the RS not that much slower than the LT against the clock. Tyres on the RS are Cup 2 and Trofeo R on the LT. Pretty similar performance in terms of grip I'd say.
My mates generally loved the LT because it's easier to drive and softer on approach, that was interesting. One of my friend had never done a trackday before, nor driven powerful cars, he immediately felt comfortable and had fun in the LT but was on the back foot with the RS.
To sum up, the RS delivered more than I thought on the track. It completes my 997RS perfectly. The 997 is better on the road, the 991 is a more efficient a track tool.
The LT was great on the track (and really amazing on the road, which ultimately is what counts), a bit too soft for me, but very good fun nonetheless.