What's the difference between the Harmon P42i and the Accentra52i?

Our old house finally sold so I can move forward with putting a pellet stove in our new house. Unfortunately, not every stove we're considering is available to demo hooked up in a showroom. My wife and I were able to rule a few out just by looking at them but that leaves the Harmon P42i insert and Harmon Accentra52i on the shortlist. We were able to hear the the Accentra52i run and it's at the absolute upper limit of the amount of noise either of us is willing to tolerate. Talking to the dealers, we hit a wall when trying to get technical details about how the two stoves are the same and different. Obviously, the P42 isn't as fancy looking. It also has slightly less heat output according to the spec sheet. What else is different?

• Most important: Are the two stoves the same noise level?
• Are they built equally well?
• Are they equally easy to do the weekly/monthly maintenance on?
• Are they equally easy for the big yearly cleanout in back?
• Are they equally easy to work on when parts need replacing?
• Do they have the same features in terms of control via the touchpad?
• Is there any reason other than cost and appearance to prefer one or the other?

Thanks everyone!