The general rule is to hold KJ in both cases. My chart in the appendix says to draw five in both cases. In addition, Shackleford found one other error of similar magnitude. Nobody with a realistic view of earning money and valuing their time at all would spend time trying to learn this distinction. But there are many other plays that make, maybe, a half-cent difference and come up three times an hour or so.
Many players say no.
They argue that the effort to memorize these things isn't worth the return. One reason I recommend the best-possible strategy is because there are a LOT of such plays. Another reason I recommend playing an advanced strategy is that if you really want to be good, you are going to be practicing on a computer. If you are using an advanced strategy, the strategy and the computer will give answers in sync. If you do not use a computer, probably the simplified strategy is easier to understand and therefore better.