Yep that it m8, I sure there is a fancy name for it but I'm referring to where the drive is coming from

as for explaining how rear is better.... I'll have a go....

Front gear drive... Allows for a shorter tank (less flank armour = lighter) but, to get torque to the ground the drive sprocket pulls the top track tight then that torque goes around the idler and then under the main wheels... This pulling puts a lot of stress on the idler and as it gets tighter the track starts to compress the rear suspension....allso while this is all happening the slack/ loose section Is just between the front drive wheels and the drive sprocket meaning the track that's been feed under the drive wheels is under no tension.

Rear gear drive, more of a direct drive because the torque goes straight from the sprocket to Under the main wheels...as the track goes around the idler and back along the top there is no load on the track, reducing stress on the track and the idler gear. Also with this setup u can fit a tensioner to the top track so u can run a longer track for more suspension variation.

From what I can understand no one knows why the Germans favoured front drive in ww2 but by the looks the majority of the new main battle tanks use rear drive systems