If the m2.4xlarge goes only on X5550 cores, then that does work out to be about 26 compute units (as they claim). So I would expect a m2.4xlarge to perform the

If the m2.4xlarge goes only on X5550 cores, then that does work out to be about 26 compute units (as they claim). So I would expect a m2.4xlarge to perform the same as a Brightbox large (which is about 26 compute units too). The pricing (and ram spec) is very different though - not really a like for like comparison, but I see that it's important to note their use of cpu type. Interested in how xen vs. kvm is playing a part here too.