Why don't you read
this comparison from camcorderinfo to help clarify things a bit?
Read it all the way through - there are several pages of it - and then look at their
conclusions.
That Canon Vixia HF10 may have a different name here in the UK ..they're generally known here just by model numbers (HF10) rather than by names ('Vixia').
As you can't seem to make up your mind between HDV (tape) and AVCHD (SD memory cards), then any differences between them are unimportant to you. So forget the recording format (cards or tape), and concentrate on the other capabilities which might be most useful to you:
Maximum zoom range,
Widest angle zoom (for successful shooting indoors),
Image stabilisation (optical is better than electronic),
External microphone socket (for interviews, etc),
External headphone socket (for hearing what you're actually recording),
Screw thread on the front of the lens (for adding a wider-angle adaptor lens),
Stills shooting capability (to shoot stills as well as movies),
Assorted manual settings (for extra 'creativity'),
Very simple 'Easy' setting for foolproof recordings,
'Pre-shoot' facility (..on some Panasonics..) for capturing what's happening in the few
..seconds before you actually squeeze the Record button.
Consider what facilities you want, then choose the camera which has the best or most of them.