I haven't ridden a '77 Maico, only earlier. The bully makes much nicer power and is easily equal on handling. It also feels lighter.
But compared to the 360/390 Husky, OMG that machine is an absolute animal, especially the 360. The Husky feels just as light as the bully and has slightly better rear suspension but the bully handles better and makes easier power to live with.
As far as looks go, the MK10 was the best looking bike of '77. Likewise the MK6/7 was the best looking bike of the early '70's.
Just my opinions though...