Through some research, I have come to conclude that the H&R sport springs are a little bit stiffer than the Tanabe GF210.
According to H&R's website, the sport spring is anywhere from 25-40% stiffer than stock. Tanabe's website states that the GF210 ranges from 20-30% stiffer than stock, depending on vehicle.
Overall, they are very close in spring rate so I would guess that they ride similarly.
Regards,
Dustin
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