On the one hand, we have the Desire HD. People may call it the EVO 4G for Europe, but it really isn't. Here we have the newly unveiled HTC Gratia. People are calling it the HTC Aria for Europe, and that's exactly what it is. The hardware appears to be identical save for some new colours, which, considering people seem quite fond of the Aria in the USA, is probably a good thing.
Another point of interest is that the Gratia will be released this November with Froyo. That's surely a sticking point right now with Aria owners, and it remains to be seen how well Android 2.2 will run on a 600 MHz processor, but it seems a win nonetheless.