The Oerter I'm doing has the step and the comb nearly even. Darned near had an anxiety attack fretting over this until I got the books out and studied in detail. The step and comb, as mentioned above, seems to drift forward and back a bit. Probably something to do with how long the rigger guard rail was and how lay out and the actually stocking ended up on any particular day. I wonder how much the old timers worried about such things. I'll readily admit I like the comb back slightly from the step toe, but I have seen others where the break was even that are attractive as well.
I'll point out to those actually considering a stepped toe, the pattern I made up for my Oerter had a barely perceptible step, I mean I would have had to have had to point the break out to most folks, but now that the stock is shaped out it looks humongous. As soon as I rounded off the underside of the wrist it really magnified the feature. I have built a lot of stepped toe guns in the past with the step as bold as the OP's pattern and believe me, there is no doubt about the step!
Here's a Brandenburg gun with the comb ahead of the step.
Here's one I did just about dead even.
CS rifle I did that's about even.
I,m not sure if there is a right or wrong way to do this, you're best bet is to study a particular school. Too the eye, some positions look better than others.