You underestimate just how wide genetic modifications can be. The differences between males and females are the side effect of a few hormonal differences and a lifetime of social shaping. People disagree how much is hormonal and how much is societal, but we all agree that those are the major differences to consider. Obviously you have control over the societal changes, so the only question is how much can you control the hormonal ones. Hormones are a big deal in the body. Genetically female individuals who take testosterone supplements gain substantial muscle mass and strength. Genetically male individuals who take estrogen supplements and testosterone blockers lose muscle mass and strength.
So really, your males and females are just operating with different levels of these hormones. But the ranges which can be supported are limited. You can only have so much testosterone in your body before the other effects start to have a dramatic and detrimental effect on your body. The body was always designed to operate in a balance.
But you're talking genetic engineering. You've got more room to play than anyone before you. Your real limits will not be sex based, but physics based.
Let's use a metaphor. Cars.
The top car is a Toyota Supra. The bottom is a Ford Mustang. Both are recognized to be decent street racing cars. The Mustang has roughly 100 more HP than the Supra, so in a straight on muscle fight, the Mustang is going to have an advantage. A modern Mustang can edge out a Supra on the quarter mile.
But we're talking genetic engineering. Let's talk modifications! Thanks to Ynneadwraith's wonderfully helpful comments below, I'm now somewhat versed in the mods which can be applied to these vehicles. It turns out that the Supra was quite overengineered in many places. A Supra's stock gearbox can deliver 450 ft-lbs, while the Mustang's was only designed for 384 ft-lbs. This means that as you engineer bigger and bigger engines, the Mustang actually starts to break down earlier than the Supra. Without making drivetrain mods, you could actually put more torque on he pavement in a Supra, despite it initially having the weaker engine. So who knows, perhaps the female form is actually capable of being moded more than the male form. (practically speaking, I do believe the female pelvis is actually a disadvantage. From what I've read, it's wider than the ideal walking/running size to support child birth. However, the jury is out about the rest of the body!)
But we're talking genetic engineering. We're not talking little tiny upgrades. You have access to the full gamut of human capacity! This is less of a "swap parts on the car to make it go faster." This is more like NASCAR. They're called "stock cars" because historically they had to be production models. However, they've been pushing the limits for a long time, and that whole "production model" thing has kind of gone by the wayside.
Here's a Toyota stock car, and a Ford stock car.
Note that they call themselves a Toyota Camry and a Ford Fusion /gigglesnort/
By this level of engineering, the cars are almost completely identical. They may have started out as a Camry or a Fusion (really?!?!), but at this level, they have basically the same engine, same chassis, same transmission, same tires, same virtually everything. They aren't limited by their theoretical origins in production cars. They're limited by the physics of what a race car can do, and what NASCAR will let them do.
But you're talking genetic engineering. Where we're going, we don't need roads, though we might as well use them if we have them: