X = No
Xarm = No arms?
Xarms = No 2 arms?
Xarmz = No 1 arm Z
Xarmsz = No 2 arms Z
Xarmsx = No 2 arms Z

Sound like FS have 1 or 2 of it arms get ripped off during fierce fight..
Dun play play...

No arms also can fight.. saw the recent FS no 2 arms chopster fight bfr..

Personally, i also prefer T-Bha FS. If strong and fierce T-Bha FS spar/fight with good T-Sub Fs, i'll support T-Bha FS.
I dont think T-Bha FS will run away/retreat bfr fight, lose in fight easily and end up as food for T-Sub FS because T-Sub FS have much bigger size.

Some says largest T-Sub might reach abt 15mm?  Largest T-Bha 8mm only?

Maybe there are other much bigger size T-Bha out there in the wild not discovered yet.
For me bigger size T-Sub doesnt mean good in fight and guarantee will alwys win! 
For me its depend more on fighting skill and aggresive lvl among these 2 species FS. 

T-Sub have super hard arms, legs, abdomen or teeth that cant be penerated by T-bha FS teeth?
T-Sub cant lost in fight and cant get eaten by T-Bha? 
Only T-Sub can eat and can beat T-bha? 
Somemore say theres no doubt about it and its a fact? 
Really a big joke!  

A bigger size T-bha FS also can get injured after get bite by smaller T-bha fierce chopster...


See how the T-Bha chopster attack in the video? Simply mind blasting like rocket!

A huge tip top conditioned T.Bha male Chopster fight against T-Sub??
More massive dmg will be inflicted towards T-Sup for sure! 100% sure, no doubt at all!

Its not impossible for T-Bha to defeat T-Sub.