Trader Vic's Big Shot glasses vs Sure Shot?

The 1960's Winchester Green glasses made to look like shotgun shells (for the Gun Club Punch) have on the bottom "Big Shot XXXXXXXXX". But I saw a set that is claimed to be genuine, looks genuine (looks vintage for certain) that says "Sure Shot XXXXXXXXX" on the bottom. Does anyone know what the difference is between "Sure Shot" and "Big Shot"?

Both legit. Maybe size is the difference

https://mytiki.life/tiki-mugs/trader-vics-sure-shot-glass-green

vs

https://mytiki.life/tiki-mugs/trader-vics-big-shot-glass-green

Interesting, thank you. I did some more research and found ebay listings for both today, and both have the same height and diameter (5.5in x 3in). I wonder if it's the difference between Imperial Glass and Morgantown Glass as the mfg?

If I'm feeling flush, maybe I'll buy the Sure Shots just to compare.