I see that Vodafone have recently announced the SE C510 available for $549.

I also see that Telecom have announced the SE C510a for the XT network at $399. That's $150 cheaper than the vodafone equivalent.

My question is this, is this the same phone, but with a slightly different model number? Could I purchase the C510a from Telecom and insert my vodafone SIM for use on the Vodafone network?

The only difference I can see is that the Vodafone C510 is black, whereas the XT version is silver. I'd prefer black, but is it worth the extra $150 (I think not). Does anyone know there is a black XT model, or a silveer Vodafone variant?

At the very least, it looks like there will be some good arbitrage opportunities coming up between the two networks.