In the Caro-Kann Panov-Botvinnik Attack 5... e6 6. Nf3, I am hesitating between 6... Be7 and 6... Bb4
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1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 e6 6. Nf3 Be7 (6... Bb4)
I would like to know all the differences between these two moves.
Which one of these two moves tends to lead on average to the most solid, positional, boring, strategic, slow and quiet positions?