You're awfully confused, not having any knowledge, but arguing nonetheless
Horsepower is horsepower. Period.
Yes it is, but PS and kW are both measures that represent an 'equivalent horsepower'. This is from the Encyclopedia Britannica:
horsepower | Definition, Unit, and Facts "The electrical equivalent of one horsepower is 746 watts in the
International System of Units (SI), and the heat equivalent is 2,545
BTU (
British Thermal Units) per
hour. Another unit of power is the metric horsepower, which equals 4,500 kilogram-metres per minute (32,549 foot-pounds per minute), or 0.9863 horsepower."
All transmissions have a 1:1 high gear. Yes, it's all the SAME.
No, it's not, because the high water marks for EV cars, Teslas, Nissan Leafs, and Toyota Prius, not a single one of those has a 1:1 high gear. So you can't compare that.
Rear end ratios vary, but that's easily determined with a floor jack, jackstands, and keys to the car.
As long as the rear end is actually in it, or if you have access to the car in question.
The point of an EV is not matching an original ICE. You can't. The torque curves are totally different. The max RPMs are also different by as much as 4:1.
Not really - take a look at a Duramax 6.6L and compare to the Hyper9. Shape of torque and climb to peak is very similar. The biggest difference is that the Duramax starts from idle, obviously. After that the torque curve is almost flat, similar to an EV motor.
Ask questions, then shutup and listen...and learn. You're in no position to preach or argue with some of the world class grey matter on this forum.
See, this is the old person mentality that I've shot down about 100 times throughout my life. You assume because I'm new to the forum I'm new to cars? I'm sorry I disagreed with your own personal Jesus, but I've been building cars for 25 years now, and I have the trophies from both racing AND car shows to prove it. As I just proved at least 3 times in this single post, what you think you know doesn't stand up to even 15 seconds of looking something up from verified sources, and when I don't know something I confirm it, I don't just assume the same BS I've heard on a web forum is the gospel. Your blind assumption that what you think you know is The Answer isn't just wrong, it can be costly and dangerous.
So yes, as Brian has said, if you're replacing the entire drivetrain, then it's probably a lot more accurate to measure torque at the wheel, it's obviously incredibly good when you want to argue hypothetical numbers on the Internet, but as complete as my workshop is, I don't have a chassis dyno, and I daresay most of the "DIY" people on this forum don't either. So for comparing drive units, torque at the crank and brake horsepower is a valid comparison in absence of that to give you an idea when selecting motors, AS I DID.
Aside from that, your argument that "horsepower is horsepower" blows your side of the argument to hell. Because that's the point I'm trying to make. Horsepower is Horsepower and Torque is Torque, so Yes Virginia, you CAN compare output of two powerplants without having to go to some obscure measurement that (nearly) no one uses. To Brian's point, if your plan is to completely change the drivetrain, then there are other things you'll have to consider to get a more accurate comparison, but horsepower is a measurement of work, and moving a car is the work you're doing, regardless.
After all that's said, tell me what the word 'knowledge' means to you, because I don't think you know what that word means.