It's not more difficult, but it takes more patience. I had the Blade CX for 2 weeks before I sold it and bought a CPP.

The 1st day I tried to fly the CPP, I almost took it back to the LHS. It seemed incredibly difficult to control and I could not hover (if you could call it that) for more than a few seconds.

I just kept at it, hovering incrementally second by second until placing it down, until I felt somewhat comfortable with the controls. Then one day I decided to just lift it about 4 feet and I was able to hover for several minutes without too much trouble (although it looked ugly).

Now after just a few months I'm into forward flight in all orientations (except 3D). And to top it off, I just built my T-Rex 450se and am now starting the learning process over again.

Most people will recommend following RADD's school of flight. To me it was boring, so I charged ahead. It cost me more $$ in repairs, but that's just the way I chose to learn.

Whichever learning method you choose, I do highly recommend the training gear, especially in the early phases of trimming.