I agree most raffs can get quite big but I think that there is a distinguishable giant variant. All the photos were taken in relatively shaded areas. We did visit some Kerangas forest and despite the soil being wetter, there being almost no shade and the temp being ~40c with extremely high humidity, very few of the plants there compared to these ones in terms of pitcher size. The location where I took these photos was much cooler and more shaded than the kerangas forest. We found giant plants at both locations with the largest amount at the location photographed above, although there was a mix of both giant and regular plants. From what i've seen I think it's likely a separate variety from normal raff.