John- I think that this discussion has gotten a little to technical for Vinval as well as most of the general public looking for an opinion.
I'm assuming that you misspoke but if not... The Higher the Voltage, the Lower the amp draw. Fact.
I, like you, was in the business for many years and now am retired.
We almost exclusively sold 48 volt trucks while all of our competitors quoted 36 volt. Like propane, 36 volt is only a North American spec. Because our industry is soooo price competitive, the reason that our competitors quoted 36 volt is because they had the illusion that the corresponding battery and charger was cheaper than 48 volt which is not the case. If you price up an 800 ampere hour, 36 volt battery with a matching 3 phase charger, the price is within $50.00 of a 600 ampere hour 48 volt battery and matching charger. The kilowatt hours are identical. They both will do the same amount of work (or move the same amount of pallets per hour) but the 48 volt truck will do the work much faster. Once a typical customer uses a 48 volt truck, no matter what the capacity is, they will NEVER go back to a slower 36 volt unit. Because the industry is soooo competitive, you need something to set yourselves and for us it was 48 volt.