Shiedbots are quite bad on hilly maps because their weapons either don't get the advantage of being on a hill while having disadvantage while being downhill OR not having either.
Thug - has plasma cannons that barely gain range with attitude
Bandit - the only unit that gains some power because it can fire upwards without any range falloff
Rogue - gets terribly inaccurate
Outlaw -
its range is not affected, it speed is greatly and it was slow to begin with actually google brought a good point below at it being able to fire trough the ground
Felon - by obstructing its view its easy to hide from it on the hilltop
Roach - this things are super powerful when hid on hilltops or just on the ridge since the enemy wont be able to react while slowling going up hill
Vandals - obstructing line of fire
The map I am trying to portrait here is something along the line of Cooperhill or Badlands.
On the contrary cloaky bots have generally speaking more speed, range gain with attitude with things like warrior and glaives, snipers (while they also get small disatvantages while going upwards), there are ticks which have the same quality as roaches and they get zeuses that can easily get in range with their lightning guns on top of the hill.
The unit that becomes near useless on this sort of maps is rocko because they rely on range and kiting they transform into this weird shotgun glasscannons. There is gremlin too but its pretty terrible to begin with and scythes are gonna scythe regardless of terrain.
Keep in mind that amphs, JJs and spiders are equally (or almost) as good as both bot factories on hilly maps.
