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That quote is for TRD springs, part number PTR04-17900-10. These are the TRD Japan kit, part number 48130-SW220, but Toyota slaps a US part number sticker on the box when they arrive in the country. They show the following spring rates:
Front K=29.4N/mm
Rear K=53.9N/mm
As for what's better/worse, you'll have to ask opinions of people who've used them, search around the forums for pics and advice, etc. Just remember, it's all opinions, and everyone's needs and preferences are different...
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