I am considering one of two kits for my bike.
1- has 36v 5.4amps
2- has 24v 5.2amps

which will give a better result on a front wheel 250w motor?

this is the new 2020 Hilltopper Sprinter vs the Leeds 250 kit
Hilltopper has a better battery mount system and much more sleek in the fact wires are true to size and not sloppy....Leeds gives so much wire that people wrap around frame....Hilltopper battery locks with key to prevent a quick theft, Leeds does not.
weight about same....Leeds has better warranty two years and seems like a better company. Prices are same, but Leeds accepts PayPal so I can make monthly no extra charge payments. I do not want a pas only a throttle to give me power for hills....when I want it.......so Swytch is out.

thanks
Larry