I have shot about 70 FP4+ 4x5's on my last 3 day nature outing and developed them in my jobo using D76, they came out fine grained and overall i'm happy with the negatives. However, yesterday i spend a day shooting at a park nearby using HP5+ and have used the same developer and can't notice any difference grain size or tonality wise between the two stocks. Is FP4 supposed to have finer grain and more resolving power ? Even at high enlargements i can't seem to notice any difference besides the fact that FP4 is rated slower. I exposed the HP5 at 200iso and developed for 14 minutes in D76. Last year I developed a bunch of HP5 in 1:3 perceptol (rated at 400iso) and the grain and tonalities still seem to be very close or identical to FP4... Any thoughts on this ?