About the Memory

They are the same thing, just a different sticker in the photo. Both will work in a pc or a Mac. All the spec's latency etc are identical in the info on that website. Just get the cheaper of the two as there's no other difference.

 

As long as the socket, size and MHz are compatible, there won't be any issue. like 'mac compatible' hard drives there's no difference, just an excuse for manufactures and retailers to inflate the price.

 

they should be the same although when i purchased memory for my 2007 mbp several years back i had to buy mac version to make it work. dunno why. But you should be fine with either

 

Macs were a lot more picky with memory back in the pre-Intel days, where having certain CAS timings on the modules was critical. Buying a Mac-specific module guaranteed compatibility.

Now, this isn't nearly as big of an issue (if at all) on modern systems, with the exception of the current Mac Pro, which calls for approved thermal sensors on the modules to prevent the system fans from going haywire.

Unfortunately, most everything tends to be cheaper in the US. However, buying from a US dealer and getting it shipped to the UK may not save you any money (in fact, you may even spend more) once it goes through customs and you have to pay the mandatory VAT.

You may consider ordering direct through Crucial or Kingston; both manufacturers have a presence in the UK.