m0useanswered grow question 2 years ago One may get taller then the other, can train it down more with LST or SCROG style grow. can also raise the smaller plant up on a booster to make the canopy even if your not locked into the SCROG net.
When I grew Maltezerz and Blue Cindy my one plant was taller but not to the point it would cause big issues.
Autos for me don't get to crazy and I don't think your going to have to many issues with that.
Good Luck!