True that the Performa and LC 475 used the same board as the Quadra 605, but the Macs differed according to their intended markets. Most obviously in their cases, wrongly shown in this instance, which does not show The Feets. You have probably caught up with feets by now, and appreciate that it is an iconic and affectionate shared joke in this Army.
One can get all the benefits of a Q605 by putting its board into an LC II case. I have one such, also with 132MB of RAM, but the paving-stone ('pizza-box') form of the LC II has much less appeal than the classical curve of the Q605.
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