There are no on-board perks (of which I am 99% sure). Your luggage allowance is obviously dictated by your KLM ticket - not by the normal HV allowance. KLM doesn't arrange for lounge access at Porto so no lounge for you either.
http://www.klm.com/travel/ie_en/plan.../index.htm#p21
we've gone a bit OT here but hope that helps.