http
/techcrunch.com/2012/11/19/windows-phone-8-users-reporting-random-reboots-freezing-nokia-htc-handsets-affected/
seems to be just with the W Phone 8, go ahead with either of those
here's a reference to aid your decision:
http
/cnettv.cnet.com/8301-13484_53-57564812-10391694/prizefight-nokia-lumia-920-vs-htc-windows-phone-8x/