nice comparison.
Remember also the 120 has a different gearbox, especially the later ones, as well as ATRC etc on the LC4 onwards. If none if those are decides then it will need to be the one with best maintenance records and in best overall condition.
Bear in mind too that the D-4D only appeared in the very last 120s then the 150 'Prado' in sunny South Africa, so either model you choose will be of interest ...
Remember also the 120 has a different gearbox, especially the later ones, as well as ATRC etc on the LC4 onwards. If none if those are decides then it will need to be the one with best maintenance records and in best overall condition.
Bear in mind too that the D-4D only appeared in the very last 120s then the 150 'Prado' in sunny South Africa, so either model you choose will be of interest ...