Is this a new build or a remodel? What is the substrate - over concrete it would have to be the engineered. The narrower boards would be most appropriate in a traditional home where the wider would be more in keeping with a more contemporary aesthetic. Solid has its place and engineered as well - if you are concerned about resale the solid typically holds more appeal long term.

replacing floor on a 1999 built home .,,concrete slab. They will put down a plywood sub floor for the solid hardwood installation . The cost of the solid hardwoord flloor even with the sub floor is about the same or a but less than the site finished engineered

The unfinished engineered hardwood is from a company called Maxwell. Is it a good product?

https://www.maxwellhardwoodflooring.com/collections/townsend-additions

Aren’t you going to have a thickness issue with the solid since the additional plywood has to be factored in? (Cutting down doors, transitions matching up, etc). I haven’t heard of Maxwell but the wear layer sounds good and the fact that it’s made in this country is good.

You can have unfinished engineered flooring installed and site-finished. Schafer's V3 ply is my go to choice for unfinished engineered.

You will want to use engineered flooring over the slab for the added layers of moisture retarders/barriers. You will be risking a chance of cupped floors if, the plywood panels are installed improperly.

NO reason at all to jump through any hoops to do solid. Don't buy into the 'sOLid Wud iZ beTR" thing. You do gluedown prefinished engineered, and it will be fine. You can install and move back in the next day.