I am looking at buying a Novak esc and someone is selling a GTB, Havoc Pro, and Havoc Spec. Which of these is the best and what are the differences? Thanks for any info!

Here is our esc spec chart:

NOVAK SPEED CONTROL SPEC CHART

...The GTBs and Havoc Pros have 2X the number of MOSFETs and offer cooler running, higher performance.
...They have a motor limit of 3.5T vs 8.5 turn with the Havoc Spec.
...Our Havoc Spec must be run with temp protected motors such as our Ballistics and SS Pros.