I have to agree that you won't find any difference. I think too much is made of this "squeezy tight taper fit" because, no matter how the engine is run in, what's the next thing that's done? Bring it back to idle and play with the idle mix. Put it in a model and start it up and let it sit there at idle, taxi nice and slow out to the strip etc. In other words, a lot of an engine's life is spent at low throttle settings so running much cooler than where it was run in. Not to mention running it in winter and summer.