Royal made some really fine kits, but are truly "craftsman" kits, meaning that you should be an experienced builder to tackle it. It's sort of "glue all the wood together, and carve away anything that doesn't look like a DC-3".

It probably comes out heavier than the Top Flite kit, which is why the engine recomendation is for larger engines.

Lastly, if you have no, or very little, flying experience, a twin would be nearly impossible to successfully fly. If you're really interested in flying, start out with a simple trainer, build and learn to fly it, and hang on to the Royal kit for much later.