thanks for the response! the spread is identical as far as I can tell. There are some included riser arms which seem to allow for a variance of distance if needed. the biggest concerns are the adjustments needed for the shower head as the length and distance from the wall are going to change.

thanks for the info! I'm too afraid to get it wrong and/or make a poor choice, so i'll just have someone come out. Was afraid it wouldn't be super straightforward

it sounds like something that isn't as straightforward as I would've liked so I think i'm just gonna have an electrician come out sometime soon and straighten it all out for me.