Just visually, the B7 Grails (7075 grails) will be shinier compared to their 6061 counterparts because of how 7075 aluminum looks (you can see this with other One Drop 7075 yo-yos, i.e. compare a Summit to a Seven Summits or Eclipse to a Lunar Eclipse).
For example, here’s the bubblegum pink B7 grail released at the beginning of August
(pic from a.returntops on Instagram
vs. the bubblegum pink OG Grail:
(pic from @Ian_Bender 's BST post)
The B7’s also weigh less; I don’t know the numbers off the top of my head but I’ll weigh the ones I have and add that here. B7 weighs ~62g, OG weighs 63g
Another way is that there’s only been a handful of the B7’s released, these are the colors:
- Pink (seen above)
- Clear/Silver
- Light blue
- Light brown