Altezza is a better track motor. Has the 3sge Yamaha "beams" motor. High rev. To 10g. IS300 equipped with 2jz GE. More power, not as strong as the GTE. All depends what your building it for (look up "hks 2.2l stroked altezza". Sick build) The Altezza has been said to be the modern day hachi roku. (Not the is300) Would much rather have an altezza, but you won't find it in the states. But u could score an IS in the states and swap the beams in for like 1300g