ORIGINAL: eldeguello
You could pull the bullets on one of each and section the bullets to see if they are indeed made the same. Otherwise, I would assume the bullets are identical, or nearly so. But the powder charges may differ from lot to lot. That's why it is wise to buy a few boxes of whatever lot proves the best in your gun, so you'll have enough for several years.
At the gun show I bought all they had left at the first one. I wanted to make sure they shot accurately since I have such a problem finding bullets that my rifle likes to shoot accurately. They aren't as good of groups as the Federal Fusions but are good enough for deer hunting and they are a lot cheaper. I bought one box to test. A buddy went back the next day and I had him get what was left. Well, they only had one box.
The next show I went to I got one box. They had 2 or 3 but not many and I didn't want to take it all.
Well, I've shot up a fair amount of those target shooting so I wanted some more.