I use both Hexagon and Modo, they realy both can only be compared on the modeling front, as Modo goes way behond that, and the price reflects that.
Hexagon dose work better for some than others, and yes the PC platform is more stable. Modo has a great set of modeling tools athough somewhat over reached in the way they are executed, compared to a more stright forward aproach that Hexagon does things.
More features tends to have a double effect. On one hand you have more options, but on the other, the simple tasks are no longer simple, they have too many steps to their execution.
I work with both side by side, because what Hexagon lacks Modo makes up for, and what Modo makes a long process of, Hexagon allows me to move allot faster for some core basics in Modeling. If you cant run Hexagon, or have too many issues with it, I would have no trouble recommending Modo, because its fast becoming a industry modeler, and has a super render engine behind it.