[TR] Hawk HPS part numbers - which one is correct for TR4-TR6

[Alain]

I am finding 2 part #s for Hawk HPS brake pads for TR4-TR6.  Anyone know if
they are equivalent or if there are any differences between these two models
of Hawk pads??

HB169N.560 HP
HB169F.560 HPS

*Hawk Performance HB169N.560 HP Plus Brake Pads for 1970-1973 Nissan 240Z -
Front (Set of 4)*
http://www.amazon.com/gp/product/compatibility-chart/B000IJIT0G/102-0315146-2807367?ie=UTF8&i=0

*Hawk Performance HB169F.560 HPS (High Performance Street) Brake Pads for
1975-1978 Nissan 280Z - Front (Set of 4)
*
http://www.amazon.com/gp/product/compatibility-chart/B000IES58C/ref=au_pf_fb_cc/102-0315146-2807367

Both compatibility charts list TR4-TR6 as compatible.

Thanks in advance,  Alain


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