i've not seen that particular variation before, according to my engine it is not any improvement on Bxc6, although it does circumscribe trading too much material off the board too early in the game. In the tutorial I was watching on this opening another way for white to play is 6.dxe5 Nxb5 7.a4
Instead of 4.0-0 it is possible instead for white to play 4.d3. Black can then try and spring the "Mortimer trap" but if white knows what he is doing then they won't be experiencing any problems.
I recently saw a game where white avoided the mainline Berlin wall defence to the ruy lopez with Ba4 after Nd6, white went on to lose the game, but the position seemed at least equal in the opening.
Black seems to have two main options, e5 or exd4, both met with Re1, Be7. Anyway, is this any good?