I'm a newbie in card collection (I collected a few things when I was young but haven't bought cards in about 30 years). There are a couple sets that have me perplexed and I'm hoping someone more experienced will be able to help me with this.

The first question is for the 2006 Topps football complete sets. There were certain box sets that had exclusive rookie packs of 5 cards (Packers, Giants, Steelers, Patriots, and a few mixed rookie packs).



I bought the Packers set which had the 5 Packers rookies pack in it. I want to collect all of the rest of the rookie packs to complete my set. I can find all of them on eBay except for one pack. According to http://www.tradingcarddb.com there is a 6 card pack of rookies numbered SB1-SB6 (Vince Young, Matt Leinart, Joseph Addai, Jay Cutler, Reggie Bush, & Laurence Maroney) that I can't find anywhere. Did Topps actually print these cards and if so where can I find them? I feel like I'm hunting for something that is an error on that website. That pack shows 6 cards (highlighted in the image below) but all of the others only show 5 cards.


http://www.tradingcarddb.com/Subsets...t-Rookie-Bonus

My second question is with the 2017 Donruss football box set and the "Rookie Threads" cards that you get one when you buy the cards set (it's a black and silver pack glued to the top of the box). I found a list of the card available which shows there are 40 Rookie Threads cards.
http://www.tradingcarddb.com/Subsets...01?PageIndex=1



My issue is that when I check eBay for them there seems to be 2 versions of each card. One version shows the player's name at the top of the card and says "ROOKIE THREADS" at the bottom. The other just has the words "ROOKIE PHENOM" at the bottom of each card (see image). Were there 2 versions of every card making about 80 total cards? Is it worth trying to get all of them or should I just collect one set or the other?



I'm having trouble finding resources that can help me verify questions like this. Any assistance or guidance would be greatly appreciated.