I agree with Yellowjacket.
The mana cost, and abilities do matter. One colored, and 1 colorless for a 2/2 with no special abilities is the typical Bear mold.
When you add in another ability or change the casting cost to 2 colored mana instead, an older card tends to fit the bill better. I mentioned it earlier with the Longbow Archer/Black Knight comparison. I consider those 2 to be closer to each other than to a Grizzley.
Longbow Archer
WW
First strike, can block flying
2/2
White Knight
WW
First strike, Pro Black
2/2
Here you get 2 special abilities with for roughly the same cost as a Grizzley. The notable differece that make them closer to the Knights than the Bears is that they cost 2 colored mana instead of a colorless. Which is the same reason why I think the newer cards resembling them are like these more than the Grizzley Bear. The steadfast Guard would also fit them closer, because of it's 2 mana, same colored type casting cost. The reason I don't really consider these all the same aside from this, is that it's a lot easier to add 1W then WW to a deck that tries to use the same creature is as many decktypes as possible. It's a lot easier to figure out the mana curve that way, and would make one slightly more eeffieicent than the other, other with nothing special about it, than for something with a slightly more, but minute, casting cost.