There's no doubt in my mind, that packages like MODO/ZBrush to name but a few, are the packages of the future.
The old packages also carry the weight of past development with them and the companies that develope them are not in a "customer first" mindset.
Companies like Autodesk act like the customer needs them for their productions whilest the fact is Autodesk needs the customers.
I think the future will see a couple more great packages that are created out of a demand( be it modeling, animation or rendering)of the market.

But to stay on topic you should learn the package MODO why not ?
There are people who play guitar but also do video editing on a same (high) level.
It doesn't neccesarily has to be a trade off.

That said I looked at the links you posted and I saw some basic extrusions which were duplicated a couple of times.
There were some tricky things which are harder in Maya but certainly not undoable, than in MODO ( I presume).

So try out Modo a 3d package is just a tool to get to a result nothing more nothing less