It is not unusual for the wrong items to be put in the right box, the link for 7007 springs shows a video for fitting front springs. Front springs have a reduced i.d at the top so you would have noticed that.
The links you have posted share quite comprehensive dimensions which make a degree of sense, one lists a free-length of 339 mm and 15mm wire thickness, the other lists 325 mm and 16mm wire thickness. Both list 5 1/4 total coils. The 16mm wire thickness will be a higher rate spring though easier to fit.
Once again good luck.
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