more about what? the different frequencies?
Um well, for example you can't tune your tv to the radio channel even though they use similar technologies. (well you could back in the day depending on your tv but that isn't helping my point
) But it just uses different frequencies, look at this for a better understanding of frequency allocation,
The chart is rather busy, but see how each is boxed off? That is what a radio designed to operate on will be limited to. the wimax and lte are very far apart from each other in this spectrum, it will be extremely unlikely it will be able to operate on both frequencies.
This talks about the radio used in the EVO.
Not an insane amount of LTE info is out there other than what's been cleared by the FCC, more info on the radios that will be used as soon as one is released. I know one thing, the freqs are different so the same roaming you enjoy now with sprint 3g will not be shared with 4g with verizon when they kick off LTE. 3g roaming will stay unaffected per sprint and verizon's roaming agreement because of same technologies and freqs used. Only the 4g portion will be different.
One chipset to be on the lookout for is this http://www.beceem.com/ends_4G_debate_LTE.html
it will support both technologies, but it unfortunately will not be in the sprint EVO. Be on the lookout though as something with this chipset might counter the aforementioned roaming problem.