I think the saddle would be a safer bet because the beechwood seems lighter and might get dirty more easily (or more grungy looking with age). But I agree that I also like the beechwood lining color better. I have the tabac saddle bag (in the next bigger size) -- I don't usually do brown bags but liked the look of this color. However, the beechwood might look better with your pastel clothes. Sorry I am not helping. But you can't really go wrong with either.
Thanks so much for your input! Yep, if only I could combine the saddle with the beechwood's lining, haha. I think I'll go with the saddle. I think you're right and it will age better.