xena xm10 or 12?

I read about security in one of the posts here, and the xena xm10 was mentioned.

I googled for xena xm10 and i found a site (http://www.mcs-scotland.co.uk) that had thouse locks.

Now, they have both xm10 and xm12, and both cost 40 quid.
Which one would be best?
I read the descriptions and saw the pictures, but im still not sure.

Anyone have any sugestions?

XM10 is fine for the job in hand

Thank you, I will get one of thouse then.
Cheers