Hi.

Thought I'd share my quick driving comparison of these two locos with the subject decoders installed.
I recently acquired the 3039 E10 from eBay, and after a complete teardown and cleaning, it was ready for an upgrade project.
Since I had the 76200 on hand and was waiting for an opportunity to try it, this was the chance.
Initially I thought I would be comparing the 76200 to the driving performance of the Maerklin 60906 in my 152, as both retain the original motor parts, but as soon as I ran the 76200 equipped 3039, it was clear that the design objectives are very different. The 60906 will appeal to the Analog lovers, as it retains much of the analog driving experience with all the hum at startup and slow speed running. I have it installed in my 152 (3366)and it is terrific.
Conversely, the 76200 appears to be an attempt to approach 5 pole quiet and smoothness, while still retaining the original coil motor and three pole armature. Thats quite a trick if they could accomplish it.... and they have, in my opinion, come close.
I compared the acceleration and decel smoothness, and overall noise level between the two. The 3039(76200) surprised me, it is a touch less buttery smooth as the 30390 in accel and decel, and the much older 3039 DCM drive bogie has more gear noise, but both are smooth runners. Even though the 76200 retains the original coil motor, there is no hum noise as in the more 'analog' 60906. The 3039 accelerates from stop smoothly and relatively quietly.
The 3039 headlights remain brightly lit at stop and running, with only occasional flicker, likely due to dirty track. The original light bulbs are retained, with their chassis ground connection (same as 60906).
My layout is unfortunately flat so I was unable to test the load compensation feature of the 76200.
I won't get into all the technical differences of the 76200 and mLd3 (or Lokpilot), look into that if you are interested.
So heres the thing, the 76200 is an economical digital upgrade to your analog Maerklin loco that does not require a upgrade of motor parts or lights, and you get reasonably quiet and smooth operation plus keeping your loco in as close to original condition as possible.
My current favorite economical digital conversion is the combination ESU Magnet and Lokpilot 5 decoder, plus interface board or 8 pole harness, and new light sockets and bulbs, which is more costly but has more features. But there will be future additional projects where i will use the 76200 for sure. Plus it is very easy to install.

3039 on the left, 30390 on the right track

Of course, they can only attempt to achieve three-pole quiet- and smoothness. Like a loco with ESU or HAMO magnet.

Other aspects are power consumption and heat generation. AIUI the 76200 feeds constant DC through the field coil to make it act like a permanent magnet. This draws more power than a permanent magnet, but allows using back EMF for load regulation - the 60906 cannot use back EMF.

Thanks for the comparison, quite interesting.

I did simple measurements of the 60906 motor control and posted my observations in this post: https://www.marklin-users.net/forum/posts/m630824-New-decoders-60906-and-60983#post630824