The things I don't like about hoodoo are no time limit, possible 40-minute games, no time limit, and also no time limit. And carts that don't move themselves when the time limit runs out, thus leading to no time limit.
And hoodoo has more maps, and more variety than hightower. If you spend 40 minutes running around on 3 different maps on hoodoo, they're different. Attack and defense are different on each map.
On hightower, both teams are the same, on both sides, for both rounds, and the map is like a big square where you stay in the same general area the entire time, aside from initial cart pushing.