Under a "heavy duty/performance" heading, the Auto Parts Giant web site is showing TRW and MOOG coil springs, both with p/n CC839 - which is the correct MOOG p/n for Gen 1 cargo coils. The TRW springs, however, are $5 cheaper ($46 per pair vs $51 per pair). Does anyone know if these are the same parts or different? Thx. Alan