AFAIC RA's classifications like that should be taken with a grain of salt. I've seen numerous examples where a known, respected or well-reviewed brand is classified as economy while something junk is listed as "standard" or even "premium."Shows up for my 01 Grand Prix as Economy. Are the PRT considered Economy?
2001 PONTIAC GRAND PRIX 3.1L V6 Shock / Strut & Coil Spring Assembly | RockAuto
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Also AFAIC FCS should be in the "economy" category.
And these classifications seem largely -- but not entirely-- driven by price. I could try to sell you a $5000 premium dog turd.....