I think that question can't be answered. A higher entropy pin is always better and protects better against bruteforce attacks. Although, there's currently no proof that the titan m2 can be 'bypassed'. But say in the (far) future it will be, and your device is held by an adversarie till that time, a higher entropy pin/pass will be much harder to bruteforce than a 6 digit pin.
Scrambling the pin will do nothing against potentional bruteforce attacks, and is there to protect against another potentional threat, your pin (pattern) being seen by someone (shouldersurfer, CCTV, fingermarks on the screen that could make a succesful bruteforce more probable). Though in my opinion this measure has far more effectiveness when used in conjunction with a privacy screen protector as u then also limit the angle from a potentional shouldersurfer or CCTV to actaully see what numbers u press, even when scrambled.
So i think it can't really be answered as to what is 'better' in general. In my opinion a 'stronger' pin is always better than a 'weaker' pin.
A scrambled pin provides some benefits over a non scrambled pin.
Form the example provided above, i guess u have to decide what is better for you in your specific case. But honestly, given the titan m2 hasn't been bypassed, and if your threat level isn't high, a scrambled 6 digit pin will do fine.