Are Micromasters and Beast Era Transformers the same size?

From the looks of it, it appears they are. Judging by the relative size of both when they stand near the rest of the G1 characters in the Marvel comic (Micromasters), and in the show (Beast Wars). In the comic, it is a little bit harder to tell, based on whoever was doing the artwork for any particular issue. I've also tried to take into account their size based on when they stand near modern humans in the comic, and the prehistoric humans in the show. They are both of course, larger then the humans, but not so much so that they seem like giants next to them, as is the case with all the other G1 characters.
This also got me to thinking: Why did it take the rest of the Transformers so long to downsize? In the comic, the Autobot Micromasters tell Optimus that a lot had changed since he left Cybertron and they had downsized their bodies in order to conserve energy. One would think that this example would have been followed on a larger scale by the rest of the Transformers, but it seems like it took another 300 years (the grest upgrade to Maximal and Predacon) for everyone else to catch onto the smaller, more energy efficient bodies. Thoughts?
This also got me to thinking: Why did it take the rest of the Transformers so long to downsize? In the comic, the Autobot Micromasters tell Optimus that a lot had changed since he left Cybertron and they had downsized their bodies in order to conserve energy. One would think that this example would have been followed on a larger scale by the rest of the Transformers, but it seems like it took another 300 years (the grest upgrade to Maximal and Predacon) for everyone else to catch onto the smaller, more energy efficient bodies. Thoughts?