I find it kind of illogical for them to be so powerful based on 2 scans. It's sheer stupidity and goes against what god (Toriyama) tells us about Chi. Goten is unable to completely control his, and that is the secret to becoming powerful. Because he is unable to, he doesn't classify as a Mastered Super Saiyan yet, which is essentially the Super Saiyan transformation milked to it's full potential. He should theoretically be weaker than Goku by default. Not to mention they aren't powerful as Super Saiyans to over-power Android 18 physically. The suit hindered their mobility, not their durability or their strength. A good area for them to fall into would be in-between the gap between Android 18 and Semi-Perfect Cell, probably right in the middle seems best.