Well the only models in those shapes that i personally own are by cold steel. I own the kukri and the bolo machete. I personally prefer the kukri. I do like the bolo as it has greater reach and will cut small saplings and brush a little better. The kukri lends it self to slightly thicker woods but does not have the reach. The main reason I like the kukri over the bolo is because of he handle shape. Now if cold steel were to place the kukri's handle on the bolo machete, watch out now that would be a great utilty cutter.