Accra TZ6 flex question - M3 or M4?

[EagleCity]

Hello friends,

I recently did a woods fitting @ True Spec. After looking at the build sheet and doing some research I was surprised to find the TZ6 M3 is Accra's 'Regular' flex. Based on their chart and my swing speed- it seems like I would be closer to an M4. Trying to check my ego at the door here, but want to get what's best for me. Curious if anyone's compared the M3 and M4 TZ6?

 

For reference, this is what I was fit into:

 

[Driver]

* Callaway Epic Flash Sub Zero 10.5

* Mitsubishi C6 Blue Stiff

* 101 mph club head

 

[3 wood]

* Callaway Epic Flash Sub Zero

* Accra TZ6 65 M3

* 98 mph club head

 

[4 Hybrid]

* Callaway Big Bertha (21* set to 20*)

* Accra TZ6 85 M3

* 94 mph club head