I have currently have a 36v Rhodan (29’ cat) a 36v MinnKota Terrova (24’ bay boat with hardtop) and a 24v MinnKota Terrova (21’ bay boat, no top). The Rhodan is more powerful than the MK. One issue I have had with a MK is that you must unplug the motor before charging. I lost the motherboard on the 24v unit; the dealer who fixed it (a bit more than $400) told me that not unplugging the MK before charging killed the board.
The spot lock on the latest Rhodan was better than the MK four years ago when I installed the Rhodan, but the latest MK is now as good. The Rhodan was more expensive than the MK, but it is a longer shaft unit, so the cost differential may not be large for identical units. Both brands are very quiet. The remotes are different, but I find either of them pretty easy to use. For bottom fishing offshore, or fishing inshore, I believe they are the most important feature on the boat.