Never heard of Orion batteries. I have used Sanyo NiCD but thats not really a good indicator of how there NiMH batteries work or hold up. I have had good experience with Elite (4500), Intellect (3600), and Gold Peak (2000). The GPs are pretty hard to find but they have some of the best discharging properties I've seen in NiMH. Maybe this might help you improve your options. To answer your question though I'd go with the Sanyo between the two, but neither would be another option given the right choice. Don't skimp on your batteries, get the Sanyos.
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