m0useanswered grow question 3y 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!