Having had both planes, I wouldn't use anything smaller than the Moki 1.80 in either. These are very 'draggy', as most all bipes are, and benefit from powerful light engines like the 2.10 or 1.80. Personally, I would use a 2.10 in both, if you insist on glow power. The Moki 2.10 is a real powerhouse, as you know, and will bring these airframes to life. I used 2.4 to 3.2 gas in all of mine. I liked the Skyshark Eagle the best. Good design, more authentic lines yet very well behaved, easier to maintain with the large removable top hatch / canopy, more rugged gear and wheel pants, among other things (it had a FPE 2.4 in it).