Banter sent me some samples of each to review, and the two are indeed distinctly different.

Card game - a little over 170 cards to collect and battle with opponents (the more cards you buy, the stronger your deck is).
Five cards per pack - single sided. One mirror foil every two packs (average). One rainbow foil every five packs (average).

Collector Cards (or memorabilia cards) - 170 cards, plus souvenir clothing and Optimus truck pieces (which are NOT part of the 170 numbered cards, but are individually numbered on their own).
Ten cards per pack - double sided, which is supposed to include one Rainbow Foil card per pack.
EXCEPT - if your pack has a truck panel or clothing piece, it will not have 10 cards in it. The truck panel is encased in a solid block that is the thickness of 10 cards, so no other cards will be in the pack (making it easy to find if you have sensitive fingers... like those hunting down Lego minifigures in their blind bags).
The clothing pieces are not as thick, but still takes up the space of 5 cards (so comes with 5 regular cards)... while the Optimus tail-light pieces are said to come with 1 or 2 regular cards because it is almost as thick as the panel pieces.
(Photos and review to come as soon as I get to processing the photos.)

Odds listed on the back of the packs...
Optimus truck panel (the shiny blue or red parts) - 1 in every 7 packs. (noted on the back of each one as xxxx/8070... so you can work out the total amount of trading cards Topps produced if their ratio is accurate)
Cade Yeager clothing piece - 1 in every 50 packs (probably individually numbered as well)
Shane Dyson clothing piece - 1 in every 50 packs
Tessa Yeager clothing piece - 1 in every 100 packs (probably because she wore less clothing, or, more of her outfits were "kept" by production staff after the movie )
Optimus Truck tail light piece - 1 in every 150 packs. (I'd much rather have the signature/unique shiny truck panel parts than a piece of red glass that could be anyone's tail light... making this rarest item, the least interesting of the five.)


I really hope that these movie props were duplicates that were going to be destroyed anyway, as it would be a shame to have signature costumes cut up, or an Optimus Truck stripped of its outer panels, when there are museums or collectors who would buy the entire, undamaged prop.