I agree with rmanbike. A semi aniline dyed leather is not a bonded leather. A bonded leather is a leather in which a layer of leather is bonded to a non leather base on the underside of the leather. Bonded leather is considered one of the least costly leathers. A semi aniline dyed leather is a fairly high end leather about the top 20% of leaterhs sold. It's not quite as good as a full aniline dyed leather as the leather wasn't guite good enough to stand on its own. A protective surface has been applied to the top. The advantage of this type of leather is that it will be more stain resistant and sun resistant than a full aniline dyed leather, but in my opinion a full aniline dyed leather looks best and feels best but also cost the most.

I matched my two couches but then have several other pieces that are totally different. I never tried to match them because to me each piece has personality now. Plus in your case the salesman has told you up front the dye will be different enough that it will look like you've tried and failed. In your place, I would go for maybe a pattern with a little of your saddle brown in it...or maybe a totally different colored fun leather in say red?...blue? which would pull in those framed pictures on your wall. OR!!! maybe even "cow-hide"...something FUN!...after all it is a gameroom!!! My 2 dark brown couches and my 2 rockers with their light brown seats and "cow-hide" backs...

Its very possible the genuine leather color will develop a different shade of white compared to the synthetic stuff over the years, but then why would you even consider siting on and expecting it to last of any bonded / synthetic stuff in the first place?

Grover’s pillow is one of my long-time favorites ( I have the square version in one of my ideabooks.) However, I am wondering will the plaid sofa be in the same room ? Not sure that would work with the succulents print, but I do love it on your chairs.