Vesc Max current 90A Vs ESC Max current 135A?

Hi Guys

First of all, thank you very much for all the content and knowledge that's been shared.

This is my first time posting. I've been trawling through the forum and haven't been able to find an answer.

I'm trying to make a jet surfboard for a bit of fun. Decided to go with a VESC as it has far more control than a standard ESC, however....

Using a standard ESC I can get my motor (sensorless 63100 200kv) to pull 135A at max, which will give me about 40kg of thrust. (it's water-cooled so it can handle that current fine)

With exactly the same mechanical setup in a static pool.

The VESC is only able to pull 90A of current at max giving only 27kg of thrust. 

I've tried the VESC in FOC, BLDC, and on all the control modes, duty cycle, current, and PID.

All the max current, rpm, wattage, and temperature settings are set way above to not limit anything. However I still cant manage to get the motor to produce as much thrust as with the standard ESC.

Does anyone have any ideas? 

Or has anyone experienced this issue as well?

Thanks guys.

I've selected the 750g motor setup, should I go larger?

Would high current sampling mode in FOC help?

Some strange setting somewhere maybe?