I would probably vote Disc Trucker if it were here.
Of the two options, Straggler 650b.
650b isn't really a "solution" for smaller riders because a wide 650b tire is just as tall as a skinny 700c. 26", or more correctly, 559, is the answer for smaller riders.
Anyone who tells you that the trucker will be heavy/slow handling is bsing you as well; I rode a 200k on mine and I regularly take it on metrics and longer.