The Merlin 25 on the XIX and the 70 on the 30 made for noticeable differences. The 2 speed, 2 stage supercharger on the latter made it longer and so extended the nacelles. Also, new intercooler air intakes were seen just behind the spinner on the lower cowl on the 30.The NF Mk30 was also similar.
No problem Andy, I made a typo and wrote "De Havilland Mosquito NF Mk.XIII/Mk.XII", I forgot the "V" and as you saw, I edited the postMy apologies as I misread your initial post. I thought you were asking about the NF.II/FB.VI kit which does not have the bull nose.
Oh, but now I see you edited the post!!!!!!