OK, I spent an enjoyable hour going thru 3 boxes of 7800 carts. I've coded these as country of origin [HK=Hong Kong], end label style [standard=black text on gray/silver, red text = red text on silver, or white text on red], copyright date [the later date for games with two dates], and S or I for Straight or Italicized copyright text.
Some observations:
The Taiwan games have a more silvery end label than those from other areas, but since it seemed consistent I didn't differentiate.
All the 3rd party titles seemed to have no variants, except Tomcat F-14 with the erroneous 2600 labels.
Tower Toppler was the only game I found with both red text and black text end labels
BallBlazer has both red-on-gray and white-on-red end labels
Not all games are listed.
Ace of Aces (China/Standard/88S)
Alien Brigade (China/standard/90S)
Asteroids (Taiwan/standard/86S & HK/standard/87S)
Ballblazer (HK/red text/87S, HK/red text/88S, & HK/white text on red/87S)
Basketbrawl (China/standard/90S)
Centipede (Taiwan/standard/86S, Taiwan/standard/87S, HK/standard/87S, & HK/standard/87I)
Choplifter (HK/red text/87I, HK/red text/87S, & HK/red text/88S)
Commando (China/standard/89S)
Crack'ed (china/standard/88S)
Crossbow (china/standard/87S)
Dark Chambers (china/standard/88S)
Desert Falcon (HK/red text/87I)
Dig Dug (HK/standard/87S & HK/standard/87I)
Donkey Kong (HK/standard/88S & china/standard/88S)
Donkey Kong Jr. (HK/standard/88S)
Double Dragon
F-18 Hornet
Fatal Run (China/standard/90S)
Fight Night (china/standard/88S)
Food Fight (Taiwan/standard/86S, HK/standard/87I, & HK/standard/88S)
Galaga (Taiwan/standard/86S, Taiwan/standard/87S, HK/standard/87I, HK/standard/87S, & HK/standard/88S)
Hat Trick (HK/red text/87S)
Ikari Warriors (china/standard/89S)
Impossible Mission (China/red text/87S)
Jinks (China/standard/89S)
Joust (Taiwan/standard/87S & HK/standard/87S)
Karateka (HK/red text/87S & HK/red text/88S)
Kung-Fu Master
Mario Bros (HK/standard/88S & USA/standard/88S)
Mat Mania Challenge
Mean 18 Ultimate Golf (china/standard/89S)
Meltdown (china/standard/90S)
Midnight Mutants (china/standard/90S)
Motor Psycho (china/standard/90S)
Ms. Pac-Man (HK/standard/87I & HK/standard/87S)
Ninja Golf (china/standard/89S)
One-On-One Basketball (HK/red text/87I & HK/red text/87S)
Pete Rose Baseball
Planet Smashers (china/standard/89S)
Pole Position II (HK/standard/83S with picture label & B&W label with 87S copyright)
Rampage
Realsports Baseball (HK/standard/88S)
Robotron 2084 (HK/standard/87I & Taiwan/standard/86S)
Scrapyard Dog (china/standard/90S)
Summer Games (taiwan/red text/87S)
Super Huey (china/standard/88S)
Super Skateboardin'
Tank Command
Title Match Pro Wrestling
Tomcat F-14 (2600 label & 7800 label)
Touchdown Football (china/standard/88S)
Tower Toppler (Taiwan/red text/88S & China/standard/88S)
Water Ski
Winter Games (Taiwan/red text/87S)
Xenophobe (China/standard/89S)
Xevious (Taiwan/standard/86S, HK/standard/86S, & HK/standard/87S)
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Sentinel (PAL) (china/standard/91S)
32-in-1 (PAL) yellow label w/ black text, no end label