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Neither of them appeal to me much - the concepts are nicer than the sounds - but I think they're more usable than a lot of other words that happen as names, e.g. names of guns.
I've seen Taiga in BAs, and it looks like it's used in other languages: https://www.behindthename.com/name/taiga/submitted - so I'd pick that, move to Japan and call it a Japanese name :)