Well your best bet would probably go down there and try out both.
Just bring your wallet with drivers license/ID of some kind and they will let you ride it around the parking lot.
The disc breaks on the hybrid wasn't that great last time I checked.
It was like bending the disc instead of clamping it although it could be the demo bike was setup badly by Halfords.
I went from Hardtail MTB with front suspension(locked when not needed) so don't rule out hardtails they are extremely rugged with semi slick tyres
it runs pretty fast on all surfaces.
I run my mantra with the forks almost locked and tons of pressure in the tyres already.
Sadly the nearest bordman Halfords is in Halifax or Blackpool for me! (40 miles just to get there). I might just got for it anyway considering the savings that can be had.
I also have a mate who runs a bike servicing and repair place who's very good. Either way, I can't go too wrong compared to what I have now, it's just what style of bike. Lots of offroad action round here but I prefer the "ride out the front door" approach than transporting, riding then transporting home approach, so a hybrid/crosscyclo sounds like the ideal compromise.
Cheers for the feedback, getting excited about riding now.