The Martek and Dyna are pretty similar functionally. Side by side the Martek looks either substantial or big and old while the Dyna looks either flimsy or modern and high-tech, depending on your mood.
The Martek uses infrared LEDs and a sensor to trigger the ignition. Dyna uses a magnet and Hall effect sensors.
The Martek will be pretty old and electronic parts, particularly the LEDs, don't last forever. But it has proven its durability and dependability.
The Dyna will be brand new with new parts. But electronic things usually fail early, and you'll be doing the break-in.
Either way you'll probably worry about it for a while and then forget it's there, and forget about adjusting timing.
Either one is good for stock coils. I wouldn't use 3 ohm coils with the Martek, the Dyna is OK with them.