That’s a major part of it. And can said gulf cart ID the tank at that range?
then there is if the missile has to make a lot of course corrections. Those will eat up fuel and slow it down finally does the tank have an APS?
It’s not a one sided deal here a lot of factors come in. The optics the position of the tanks is moving and if the hit is effective. Because that is a one shot deal. If you miss the firing turns that gulf cart into target practice.
I would say that the detection and engagement range advantage would always go to the TGC, since it will just be mounting normal ATGMs, and in most ambush scenarios, would have a similar profile as a ATGM team by taking advantage of cover and natural elevation/depressions etc.
However, on just the evidence of the pictures so far, I would query if the guided missile we have seen mounted really is for anti-tank work, as it is on the puny side.
Now, maybe it has top attack capacities, but then that would make it a very niche weapon for special forces/paratroopers to be carrying.
I would have thought that a traditional heavyweight ATGM like the HQ8/9/10 would have been the best choice if anti-tank was a major consideration, as those weapons would have the punch to trouble pretty much any modern MBT you might encounter on the battlefield, while still being useful as a direct fire weapon against non-tank targets like bunkers, high value targets and the like.
Looking at the TGC, it is clear that minimal weight is a major design requirement, that means top weight becomes a serious consideration, especially if you want to maintain some passable rough terrain capabilities. As such, I don’t think you can mount a traditional heavyweight ATGM on top without seriously limiting its mobility or introducing significant tip over risk.
The guided missile we have seen is likely intended for light armour, fortifications and heavy anti-material work primarily, and the TGC would not be squaring off against MBTs unless as an absolute last ditch hell merry play. The only other time the TGC might even think about taking a pot shot at a MBT is if it managed to sneak up for a rare shot, or going for the tracks to disable it.