The biggest difference is that the 3 power evasion gets taken out by bronze sable, so no, it's worse than a first strike flyer
I'm sure if you thought about it for a sec you'd realize there are common cards in black that kill x/1s and that that isn't much of an argument to ignore blatant signals.
yes, because bronze sable is the only card that can block intimidate. it wasn't just, you know, an example.
there are 10 common creatures that can block griffin. of those, only 5 can kill it and only 4 of those survive themselves.
there are 14 common creatures that can block Spirit. of those, 12 can kill it, and 3 of those can survive.
evasion isn't just evasion. it has context, and the context says Griffin's evasion is better. better enough to be worth sacrificing the 3rd point of power? debatable. but at least there aren't decks where Griffin's evasion just shuts off.
You're just looking at cards in a vacuum yet again. Drafting isn't based solely on the cards you pick, much more important is picking colors that are open and you can then turn into a deck.
You can go on and on about the list of cards that are better than other cards, or cards that beat other cards, but it's missing the point entirely: white is not open (not to mention it was, by far, not the "best card" in the pack as you claim) and black and now, obviously, blue is. This is much more worthy of discussion than listing a bunch of arbitrary cards that beat other cards.
Griffin isn't a card that you measure based on what can "beat" it. It's a slow clock and thus a mediocre pick in a color that's not even open.