Grug
Veteran
Not sure leaps and bounds better. The sony is very good. Sony viewfinder also have lut support no problem. Also frame guides. So advantage of zacuto is false color and waveform. For weight zacuto need extra arm holder and different top handle. Your top handle look heavier than original sony. Original sony weigh nothing. So in end with extra arm and heavier top handle weight is probably same.
Nope, it's leaps and bounds. Put it down to Moore's Law and the onward march of technology.
I've shot with both on the F35 now, and the Sony I just can't trust for critical focus, the Zacuto I can. That's all there is to it really. The rest of the Gratical's monitoring features (and ease of use of those features compared to every other EVF on the market - Sony, Arri, Red), is just gravy on top. Paired with the Axis Mini arm for mounting the EVF to the handle, you also get a FAR superior range of adjustment to get the EVF to a comfortable placement.
I measured both combinations, and the Zacuto with the Axis Mini and the Wooden camera top handle, saves you about 300g compared to the Sony EVF and top handle. It's not a tonne of weight, but it makes a difference.