Odd question... What should the top of the spark plugs look like on a 2.0 8v (AGG)? I've ordered some and they have an end like this:

But my existing ones have an end like this:

A quick browse online shows everyone seems to have the wider type (which means I was probably shipped the right stuff). So do I have some unusual after market ones? The HT leads *look* like the standard ones (i.e. long metal shroud etc)..
Any insight would be welcome, apologies if it's obvious and I'm being a 'tard

S