The TC 9.18 is a standard GMB target, the other I've never heard of. But with MeasureTool you can build any target you so desire (you could type in 938 if you wanted and could have such a target). As long as the reference file and target file are in sync, you can use it (unlike many other profile packages).
The service sounds somewhat suspicious in the part about a target developed with Epson, I know of no such target, at least in the US. Could be an issue in translation?
Depending on the Epson and driver, I'd like more than 936 patches. 1729-4096 work quite well as Bill Atkinsion has demonstrated with his targets.