Helmet camera advice for Mountain bike or road cycling?

I am currently testing a couple of helmet cameras (action camera) for picking up footage on my rides. One of them is an Adrenaline Systems which I have
heard plently of positive stuff. Any advice i should follow to make sure the specs are good and it is worth keeping?

Why don't you tell us the specs - as you have not revealed the name of the second camera or the model of the Adrenaline Systems camera or the specs of either of them - any advice would have to be either through tarrot card reading or spiritual communion.

;P

One of the cams has is CCD and the other a SD card unit. Any suggestions?

A CCD (charge-coupled device) is a sensor - and an SD card unit is a storage device.

?

I will post what I find out after this week when I have had a chance to test them out. Any feedback will be appreciated.

You need to ask an answerable question first ! :)