If they all came from the same source, I'd see no reason to trust any of them. Weigh them accurately, and see whether they stick to a magnet. I'll bet that none of them pass both tests.
Weigh and check if any are magnetic. Those are two of the most reliable tests and they are easy to do.
You've got sharper eyes than mine. I'm wondering whether that "Peace dollar" is really larger in diameter than the "Trade dollar" or the "Seated Liberty dollar"...
There weren't any legit Silver Eagles made with a date of 1908, and the Peace, Trade and Seated Liberty dollars should all be the same diameter (within half a millimeter or so). Did these come from Craigslist, eBay, or some other online source? A flea market? A "friend"?
The peace dollar and seated liberty dollar are extremely close in diameter, and the trade dollar is slightly smaller.