I have both...
Cockpitweb is by far the best i found, its the most expensive too. But the deviation is good, but as said, they keep chaning the deviation tests, unless deviation tests are done randomly from reverse and normal axis tests because i have done one of each now, but stupidly practised for the wrong one on my last attempt.
Make sure you set your joystick to the most sensative mode possible, as the FTE joystick is on steroids, its so so sensative, where as the Cabair joystick you need to rip it out the socket in some cases.
Compared to the costs of Aptitude tests and the whole flight training scheme, then £50 and £25 are pennys...