Dont worry I know what you mean. Its a difficult one to derive this as your nose is a little different to mine, yours is more of a Roman shaped, very strong and narrow. I havent adjusted the front area (tip), just the inner front thats visible above the lips (circled) Ive got a ton of reference on that area and the differences are amazing.
I have feeling as well that age differences play a big part again in that area, as the older you get the more 'Droopy' things like ears and noses become. Ive studied my wifes nostril and its generally a traditional kidney shaped hole, but looking at my daughters they are more a smoother oval in fact they are almost circular.
I do agree that the front of the nose near the tip tapers in more which is something that Im aware of and will get taken care of in due course. Thanks for your input Daniel once again, much appreciated. I'll post some more angles later