This is very subjective, but if all you need is to get ideas laid down, work demos out, I think L6 Native is an acceptable way to record.
Anything decent is OK to use on demo stuff IMHO. The Kemper really records well. I was amazed how well an Axe FX 11xl sounded on a studio recording I did. The Kemper is so much more to my taste, and it sounds just so f.good.
A/B trials are one thing, but if no one knows what you used, I really don't think they'd even mention it. I used a Les Paul on a video I did, and recorded the solos on an Axe FX. Amazing, people told me I had got a classic Les Paul sound, through some valve amp really loud. No, I used a Strat with Seymour Duncan's and an Axe FX... People believe what they see. lol