Yeh im still new and picking up my HP IPAQ RW6828 today but from what ive read on these forums so far, and correct me if i am wrong.
The HP IPAQ RW6800 models arent capable of flashing O2 Atom roms due to a lock/ encryption on the RUU.
...and I think the HP IPAQ RW6828 is a better comparison to the O2 Atom (not exec). Build wise based on peoples opinion the O2 leaves fingerprint marks on the gloss body and also is a little less durable to hits compared to the HP. But to be honest I dont mind a nice gloss
But besides that i think you referring to it being better might be for the fact that the rom is more stable. Although now O2 is releasing newer roms with fixes and yeh thats my 2 cents.
Magician > Prophet > Atom > Diamond > Raphael > Leo
HTC HD2 (LEO)
ROM: Artemis HD2 v10.0