2 pole vs 4 pole with same winding
 

pretty cool lesson here explaining how you can do it yourself:
https://sciencing.com/how-8785428-ca...ht-length.html

I'm not 100% sure, but I think the Slate motors are either 2 or 2.5T. It's really hard to compare a standard 2 pole motor to one of our motors because the design of the motor is vastly different. Our green motors are mostly 1T motors with various lengths of stator to change the KV. If everything else was equal, going to a 4 pole from a 2 pole would half the KV of the motor, but stator and magnet design will change between the pole counts and will affect the KV quite a bit.

If you want the fastest 13.5T spec motor that's currently on the market, then get the Punisher, it's not ROAR approved, but just as fast (if not faster) than any $150 team motor on the market. The owner at our track is allowing the Punisher to help keep costs down and eliminate motor wars in the 13.5T class:
Trinity - Punisher 13.5t World's Fastest Spec Class Sensored Brushless - PUN1001 - Active Powersports

These motors have tons of torque so you can gear them up higher than traditional spec motors. They like to have the timing set around 47° too.

Yeah for any sort of spec racing, it's going to be hard to convince a race director to let one of our motors compete just because they are very different to standard ROAR spec design that everyone else makes. For some club racing you might be able to make a case to keep running it based on lap times if you can prove that you have competitive lap times to everyone else in the class and that you arn't blowing them away with your speed.

For comparison of how different our motors are think about the fact that our 4600kv motor is a 1 turn motor but a 3.5T 2 pole motor would be ~10500KV.

Something to consider is that one reason why spec racing is more popular is because "slower is faster" meaning that having too much motor can be a bad thing, causing you to blow corners and spend too much time on the brake where a slower spec motor allows more smooth throttle control and less likely to break traction... it's not uncommon for 13.5T spec motors to beat guys running open mod... yeah a mod driver can turn a faster hot lap, but what wins races is consistency and it's a lot easier to get better consistency with a spec motor ;)

A seasoned pro driver on the other hand can handle a hot motor and knows how to tune their radio properly for a given track condition.

You simply can't compare motors like this. turn count in itself is nothing.
A Neu 1515 2 Why does 1100Kv while a 1515 2 Delta does 2050Kv, same turn count, wildly different KV.