Size of studios is close to the same. Big difference is bathroom area configuration. At Jambo, you have the sink in the open area and the bathtub/shower in the adjacent, separate room with the toilet. At Kidani the toilet is in its own room, but the bathtub/shower is in the open area next to the sink, and thus those in the shower can potentially be seen by others in the room who walk by in the hallway leading to the front door or come to use the sink. At Kidani a near the bus stop or near transportation request with standard view has a higher probability of being met than Jambo because about 40% of the standard rooms are fairly near the bus stop.
If you happen to actually want a savanna view with a standard room, then odds of getting one are higher at Jambo because more than half the standard views at Jambo have savanna view, resulting from the conversion of savanna view rooms to standard several years ago because rooms did not have great savanna views (but still not bad). A request for a room along Kudo trail (the left side of the U-shaped Jambo buidling), gives you a decent chance of getting a savanna view because all standards on that side of the building are converted savanna view rooms. A smaller percentage of the Kidani standards are converted savanna view rooms, to have a decent chance of getting one requires requesting a room near the Pumba elevator, and if you get it you will have a very long walk to the bus station.