It does get tough to follow and it's getting more difficult as we get more technical. They're talking with us in the MKIII forum about the 7M too. I think he/she is weighing their options and wanting to understand the differences in the lubrication systems of both the 7M and the 2JZ (GE vs GTE). We should see a post in the MKII section soon too.
Sturbo, the lubrication system differences between the 2JZ-GE and the 2JZ-GTE are pretty much the same as the 7M. The GTE has a higher volume oil pump, an oil cooler and it has oil squirters. Other differences are the same as well: different intake systems, different systems for air flow measurement, GTE is lower compression, GTE has higher flow injectors and a higher volume fuel pump. (Please correct me if I'm wrong on any of this.) I don't know if they have different cams like the 7M.