Starters--HP, KW, Torque, foot lbs, PMGR & OSGR

[Bihili]

So I needed a starter for my BB. I did my normal research on the subject and found it difficult to compare.
Some companies want to use KW, others use horse power (HP). They also round up their actual HP
Very few use foot lbs of torque.
There is the Delco design, the Hitachi design and Nippon design.
The PMGR, permanent magnet gear reduction starters were the hardest to compare.
Some use smaller HP motors with a higher gear reduction.
I guess the smaller motor with a larger gear reduction draws less current???
Standard gear reduction seem to be 3:75 then it went to 4.0 then 4.4 then 6.0
The OSGR, offset gear reduction still uses copper coils but comes in different gear reductions.
They all market how much compression they could handle but most lacked details.

In the end I bought one based upon the 180 lbs of torque it could deliver.
I didn't know this was going to be a complicated decision.