i'm a huge oram fan, but i'll try not to be too bias.
i think oram and flintoff are both different types of players especially when it comes to bowling. i don't think that you can compare the players in test bowling as flintoff is more attacking and gets more speed than oram, whereas oram sees himself as a stock bowler supporting the more attacking bowler such as bond, tuffey martin(?). I think that there batting skills in tests are quite similar, but think that at this stage oram might have a slight upperhand with his batting after consistent form before injury in the last 12 -18 months, but i think that we would be able to make a fair decision after we hae seen flintoff play australia.
In ODI'S flintoff clearly has the upperhand in the batting stakes, because of the position he bats and the way the English team plays ODI cricket, Flintoff gets more of an opportunity to come in and get 100's, as he bats higher up the order and the English openers were probably out pretty early. Whereas Oram bats between 6-8 in the One Dayers, the way NZ plays cricket is that we base it on the top 3 getting a decent score, backed up by styris and marshall (whatever the batting order is) the NZ team try to get to about he 35th over stage with about 3-5 down to let players like Oram come in and give it a whack. Oram when he has come in earlier has shown that he has the skill to get his eye in then launch from there but at the moment most of the time he is only required to have a slog at the end. At this stage Flintoff has the upper hand.
In ODI bowling, i am not that sure and am not going to look at the stats as I haven't seen Flintoff bowl as he was out in the NatWest Series, but Oram is a very effective ODI bowler a he has shown throughout his career, his economy rate is great and has the ability to frustrate the batters, use his bounce and get about 2 wickets in a game.
Fielding stakes, pretty even, they are both big guys, but you can't really compare as Flintoff fields at slip and Oram at gully or on the boundary. So if you are doing it on a purely stastical basis, it is a bit onesided as Flintoof at slip will get more chances than Oram in gully or on the boundary.