Based upon information that Jim has given to our team, there is a difference between Sensor only and Dual (hybid) modes in how they operate.
In Dual Mode the esc uses the sensor and the motor timing set on the "timing ring" to start and then it seamlessly switches into sensorLESS mode which uses the timing set in the esc. In Sensor Mode the entire operation is by the Hall Sensor and timing set on the "timing ring". Dual Mode is more efficient and gives more top end speed. Based upon my testing they will need different gearing and timing.
It should be remembered that the LRP uses dynamic timing advance and is NOT a dual mode esc so your gearing for an LRP will only serve as a baseline for you to start figuring out your gearing with the RS Pro. I think this is why yyhayyim suggested that you were over geared or running too much timing, and your motor temps seem to support that idea. The fact that you were slowing down within the first minute may be a voltage issue being caused from over gearing as this can pull excessive amounts of voltage out of the batteries and heat them up thereby increasing voltage suppression.
Here is something to try:
-Set the timing back to 12% with the motor timed at 0.
-Adjust the gearing to get the motor temperatures into the 130-150 F and the RS Pro showing in the 4-5 temp. LED indicator range after a run.
Do NOT concern yourself about straight line speed at this point.
Your goal is to get as close to these temperature ranges as possible with gearing. You can not compare what other people with their LRP's are doing with what you will be doing because the two esc's drive the motor differently.
Once you get these motor and esc ranges then:
-Turn up the timing via the Hot Wire to get the desired straight away speed and fine tune from there with timing and gearing.
-Keep the fan blowing on the solder posts.
For a 6 minute run on a 3.5 - 4.5t BL I would think that you would want to keep the motor in the 150-170 F. range and the RS Pro's temp. LED indicators between 4-6.
BTW, 95% "Brakes" is a little excessive (I don't know if this is push brakes, initial brakes or drag brake). It would be like running full maximum brake setting on the LRP, and I would think it would spin your car out. The "weird" sound that you hear may be from your motor or a belt skipping in your car.