The Jackson pedal unit has a 1 to 12 gearing ratio which exceeds the 1 to 10 of the Natives and the 1 to 7 (I believe) for the new Wilderness pedal yaks.
And, the Jackson will allow for an adjustment that will make for a low, medium and hard pedal setting. Interesting.
One thing about a Slayer Propel 10 and likely 13, too, is just the literal weight of one's legs cycling around is all the resistance that it takes to get up to a cruise speed.
No matter, in the end theoretical hull speed calcs more or less define the maximum speed. Setting gearing for "hard" might not actually give one much of a top end speed advantage. Still, some room to set things the way they feel best for the operator. Nothing feels worse to me than too little resistance. I never liked pedaling a 10 speed bike in the lower gears either preferring a moderate resistance of mid gearing.