So, as of late, many a person has begun to say that Ryoma's new incarnation is better than Elincia, and many other things that I just can't get behind overall and I'm gonna voice my opinion and want any other's that wanna talk about it to be my guest, as this unit is the first one to actually cause an uproar in the whole, best unit, category.
Now, as a red sword unit, he's entered a stadium of units that are saturated, as per usual with sword units. He has a atk spread of 34/39 and is pretty strong. That being said, to be "optimal" with him, it requires a bevy of sacrifices to said unit, including such units as Soleil, Sothe, etc. Elincia on the other hand comes with a built in weapon that allows her to double right off the bat, and with the ability to run QP or Heavy Blade to activate Moonbow or Glimmer on her second hit (varies by build and IV's for both). I'm not saying Ryoma is bad in the sword department, just saying that, due to having Elincia as a unit, we don't really need Ryoma, because of you we're to run his optimal set without the firesweep sword, or use bushido without said sword, you'd be sacrificing his ability to use desperation, in turn limiting his combat abilities to low damage fights.
Now unto the more frequent debate I see. Who's better for flier emblem. To me, the answer is Elincia. Both can work on similar levels. And if both share similar sets (same S Seals, with same IV's) they are on par for most of their kills. The difference being that Ryoma doesnt get hit and killed on any battles, whilst Elincia becomes injured during a few fights with units that survive her initial assault. However, due to the nature of Ryoma needing so much babysitting until he gets all of his bit and bobs (opposed to base kit Elincia being dambomb) I find that she's better, due to her getting more kills when running a very similar setup (using Amiti instead of FSSword).
I'm unsure what the general consensus on the comparison between the two is, as I've seen a fair bit of comparison. Now, for those that love Ryoma, don't get me wrong, he's cool and all. But, Elincia in general, to me, seems like a simpler, easier unit to use that is just as strong, if not stronger, when the two are under most of the same situations.