An Orderly Landmate. Initial setup to do direct comparison to Horseman.
Base Vehicle: EVO Orderly (Arsenal 120)
2 Mechanical Arms
Walker Mode
Special Equipment (Medkit 6)
Modifications
Rigger Cocoon
Armor: Normal 6
(Can not find price for Clean Car Coating in Spy Games,not included)
This is the core vehicle. Everything below this point is the same price and performance if added.It has 2 full mechanical arms, can add 3 more armor, moves at 32. Of significant importance it still has two open slots for modifications. Oh - while it "only" has a medium drone sensor, the sensors listed for the Horseman would fit. Both would have more sensor slots remaining, though the Horseman would have more. The Orderly requires a rigger cocoon to create a closed cockpit in contrast to the existing cockpit of the Horseman. As a benefit, it gives the controller +20 armor (barrier 10). The Orderly at this point costs 4700¥.
The Horseman at this point has no remaining open slots, has one full and one grapple mechanical arm, can add 6 more armor, and is 5.5 faster. Price at this point is 30,700¥.
From this point, the bottom line is that the Horseman pays 26,000¥ for more sensor slots, 3 more body, 5.5 more speed. In the process it sacrifices two slots, and the pilot does not get the protection of the rigger cocoon.