in my humble opinion. all these numbers are just about (edumacted) W.A.G.s, since none are calculating the full_ wattage_ used during the full charge-cooldown-use cycle, (not just 1 hour of charge, which as we all know can very greatly depending on state of charge) heat loss during charge, the fact it takes more than 1 watt of electric power at the (A-C) wall socket to charge the battery so that it outputs (D-C) 1 watt at the lift motor, we are also calculating the amount of watts put into a battery based on it's voltage loss (apples and oranges) and not watts output.
Nor are we including in the numbers the advantage of no idle motor running time in an electric -vs- how much an LPG unit uses just sitting waiting.
We are also promulgating the false notion of a lead acid battery having only so many cycles. This is an over simplification used to explain to (supposedly clueless) operators why short charging is bad, (without explaining how an industrial battery differs from their car's lead acid battery that can recharge every time they start the car), not a design feature in forklift/ industrial or lead acid batteries.
The most telling thing I ever saw was an ad for LPG fueled forklifts about 15 years ago, that admitted (even then) that electric was "less overall cost of ownership between years 5 to 10, but hard to find anyone who would work on them, where LPG could be repaired by anyone who could work on gasoline motors"
Since most managers can not see past the end of this current month, the driving factor is more often the environment the machine will operate in, and not what the company plans on doing in 8 years from today, when the capitalization of the more expensive (electric powered) unit pays for itself.