General rule of thumb-
Aromatics - Age is minimal benefit as the flavourings die out, kinda like infused cigars.
Virginians (VA) - Benefits most from aging, flavours become deeper and richer and sugar crystals form on the tobacco, VA is high in sugar and yummy. Well aged tins of VA are known to bulge.
Burleys - Properly around average I'd say at least from what I hear.
Latakia (english, balkans etc) - Supposed to be a derivative of virginia and definitely benefits from harsh, loses some harsh notes and enriches flavour, probably same for orientals too.
Pipe baccy is wildly different from one blend/variety to another. For example a VA blend could either consist of purely one type of virginian or several, or others such as VA/burleys, english, balkans, aromatics etc can consist of mutliple types of tobacco. Then add the different forms or cuts of tobacco eg plug, flake, cake, ribbon, shag. When smoking a ribbon cut you could be smoking different quantities of each tobacco in the blend at different types altering the flavour.
In my humble noob experience some baccys do taste the same start to finish, but it's a beautiful start to finish, while others do transition with different flavours/tobaccos dominating/culminating at different times. End of the day, depends on what you're smoking.