Seems like a small difference, but I'm choosing between a handful of convertibles, and weight is a large issue for me. The weight for the unit cited in this review is exactly the same as the one cited in the review of the i-5 model, despite the fact that the i-7 tested has a larger SSD.
Both model weights are significantly higher than the ones on the MS website (https://www.microsoft.com/en-us/surface/devices/surface-pro/tech-specs)
Not saying the discrepancy is yours, but any ideas why it's there, and why the two units you tested weigh the same down to gram level?
Just noticed...The picture of the i-7 unit tested shows a keyboard cover, and input devices are mentioned as a "pro". The keyboard cover is not mentioned in this review or the one for the i-5 (picture shows no cover). Did your test unit include a keyboard cover? The .65 difference is approx what MS says the keyboard cover weighs.