Why are you comparing fuel burn with different units?
The fuel burn figure was provided in volume not weight and, as mentioned in the notes, I simply did a straight conversion. Also .. there is no change to the end result.
However, you are right that (in terms of consistency) it is better to maintain the same units so .. please see the revised table (below).
I am using 0.80kg/l as the approx. specific gravity for JetA as mentioned in the note beneath the table.
I have not mentioned 135/429 operating costs or depreciation. Regarding the latter I believe the 429
may offer a slower rate of depreciation than the 135 in much the same way as resale values compare (in terms of depreciation) between the 350 and 407 but, with relatively few 429's on the used market, this is still difficult to judge.