Your description doesn't sound so meticulous. ;) I would not feed a gravity toilet discharge into another toilet's plumbing. Just seems like your asking for trouble down the road with clogs, etc. Probably isn't code-compliant, either. The macerated output would be mechanically "digested", would use smaller diameter piping, and is therefore probably more amenable to piping into an existing toilet drain. That said, gravity hasn't failed yet, macerating pumps can and do fail from time to time. I have to ask, why aren't you plumbing the new toilet discharge into the waste piping farther downstream, or directly into the waste stack piping?

Thank you for providing feedback. Additional demolition and work are required for the waste piping downstream, which I was hoping to minimize. While my wording may not be meticulous, I aimed to articulate myself clearly and seek a solution for the issue at hand.

So you're not adding a new bathroom; you're reconfiguring an existing bathroom? You may be able to solve this with floor framing changes. The raised toilet and mascerating toilet aren't good alternatives.

Is this over a basement/crawlspace or is this above a finished level?

Just FYI: The orientation of the floor joists is a common issue in planning drains. It's something to be considered very early in the "feasibility" part of the planning.

And your floor joists are 2x8's - even though they only measure 7-1/4".

You're going to need to get the drain right on this - including the vent stack, slope, proper connection to existing, etc. Don't be offended when I say that I think it's beyond your skill level.

Hire at least this part of it done by a plumber who knows what they are doing.