Im not sure on the weight difference if there even is a weight difference I know that the proelite arrows are the standard arrows tipped with field points. and that both are made by Gold Tip the preminum hunter ones come with eithe Nap Thunderheads or Nap spitfiresindividually tuned and testedfor truness and the names are TenPoint ProElite and ProElite Preminum Hunters. they are a 20 inch 22/64 shaft and they are weight testedand hand selected to within 2 grains per dozen and they are fletched with Norway Duravanes that info is from the 2005 online catalog if I missed anything or if you want the excite write up on them I could try to copy and paste it and send it to you via E-Mial.
and so far as the plastic nocks they are wearing fine for me the only problem I have had with them is when you have a robinhood they tend to shatter..lol..