Ok...I watched this a half dozen times now and very informative! But not about any parity differences( I see very little), Sometimes what you think you see is nothing close to what is really happening
Matt, I have to agree with Ron about the video. Everything I see is related to racing lines and how the car is being navigated off the corner. Not saying you are wrong about the torque, just that thus video doesn't demonstrate it to me. Have you driven a 99 in competition yet? If not, it is possible that you are doing so well in the 1.6 precisely because its characteristics suit your style. You may not like the trade offs for that torque.
I think that the video is painfully obvious, so the fact that you two don't see it means I must be delusional... Ron I was telling you about my eye twitch last weekend maybe I really am going nuts 
Very clear that in the first clip I am accelerating ahead in 2nd gear (probably a similar exit speed, but I should be going slightly faster because I started accelerating at an earlier point in time simply due to being farther ahead on track. The time gap should stay the same, but the distance between us changes based on speed, like I said we all know this. A one second gap at low speed is a couple car lengths, at high speed it could be 50 yards). By 3rd gear we are going the same speed, and 4th he is going faster. This is the complete opposite of what should be happening, and has nothing to do with a draft as I prove in the second clip when it barely makes any noticeable difference for me. Joey Jordan was following me for the first few laps in a strong 1.6, and I have that video of the spring effect working as it should (low speed high acceleration the gap increases quickly, high speed low acceleration the gap increases marginally). But like you all said, these are all selective data points (even though I saw the same thing every lap, and in three other locations on track), it looks like I am giving off the vibe that I am whining when I am just trying to provide some meaningful data, I will upload the full video to let you make your own decisions. The 1.6 is faster in some areas, but IMO these advantages cannot offset torque. Lap times might be the same, but the only way to win a race in a 1.6 is to start on pole and walk away, or wait for leaders to make mistakes. This is why I usually just ride people's bumpers so that they check their mirrors too much and make a mistake.
I have driven Ron's '99, and by my 3rd session I had adapted and was setting decent times. Good chance I won't show up to Laguna with a 1.6 next month (not with that uphill cliff of a back straight!) so that might be a good test to see if I am any more competitive in a 1.8. Who knows, I might be slower 
edit: just remembered that at Buttonwillow the weekend before, I did not see that same difference between my car and the NB's I was battling with, was almost identical acceleration. Now I am confused 