Resistance wise if they are the same it shouldn't matter. Gauge size and coil daim will impact the ramp up speed though and overall temp of the coil which if I am reading this right you are trying to get 2 coils to fire at different temps?
You didn't mention the type of wire you'll be using though. 5 wraps of xG wire doesn't mean much unless the material is know. Kanthal you'll be about .6 but SS you'll be about .25 per coil so / 2 = .125 overall resistance. You'll see a bigger variance in coil temp and ramp time the higher the resistance the coils you use which would give you more wiggle room on finding the sweet spot via VW adjustments.
Since you are using a regulated mod....go for it. In the realm of learning things you'll start to understand parallel resistance, and how wire and coils sizes are impacted by size and current and the correlation the coil temperature.
Stay in spec of what your mod can handle.
Play with a regulated mod and not a mech for this type of stuff.
Here is a good read explaining loads with parallel resistance that you may find helpful
Electrical/Electronic - Series Circuits
Cross check everything with ohms law
Also remember, current follows the path of least resistance.
I can tell you what will happen though at least with a moderate resistance. The smaller coil will fire hotter than the other until the other one catches up close in temp. The bigger coil may(probably will) stay cooler due to the gauge size and the coil diam since it will have more juice to effectively cool it down and has more thermal mass. It will also take longer too cool off due to the thermal mass.
At the end of the day you'll probably just use same size coils though for just simplicity unless you are trying to dial in specific flavor notes for a specific juice. Or you could wait for the Fusion 2-in-1 mod (assuming it is worth a hoot) and truly understand more beyond this exercise. It all boils down, literally, to coil temp and flavor