Out of the box I think the Odyssey can handle a bit more oil than the SD-73. The Odyssey is a bit more angular than the SD-73. Both hit and carry well, especially on light hits. But for heavy oil....I mean real heavy oil, you still can't beat the Epic Battle. If the conditions are a little less than true heavy oil, then either the Odyssey or the SD-73 work well. I'd vote for the Odyssey but I have both and love both, but I'm using the Odyssey the most.
Chuck