Did I order wrong plugs?

I have a 2002 Rodeo 3.2. I tried to follow the advice on this site. Saw the link to spark plugs.com and read that they were $6.80/plug. So, after following the link, the only $6.80 Denso plug was the double platinum PK16PR11. Now I see a post on planet isuzu which states to use K16PR-P11 NOT PK16PR-P11. The numbers are very close...did I screw up?

I ordered the same plugs and have 20k on them with no problems.

Really? I've read a few posts that said be sure to not get the double platinum. Something about the main and ground electrodes having platinum tips whereas the single platinum plugs just have a platinum main electrode. I really don't know if I should use the double now.

OK..this is getting stranger..I just calle Denso and was told that they don't have a single platinum and they never heard of part # K16PR-P11. He also stated that if I have an 02 Rodeo that I shouldn't use Denso platinum plugs. Now I'm totally confused.

That looks like the same plug I ordered from sparkplugs.com. Been running them for nearly 30K miles. Its a pre-gapped plug, just put a little anti-seize on the threads before installing.