Yes, the 2217 1250kv will have a bit more power, it's the better option.
When sizing a motor look at the watts, that's the measure of power. I believe in 1 horse power, there are about 746 watts.
The kv is the speed you want that power, if you want lots of lugging power & limited top speed, pick a low kv motor, 1000-1200 or so. If you want to go fast but have less luging power pick a high kv motor, 2000+. With kv, think transmission, low gear vs high gear. The engine power is unchanged but the speed the power is delivered is much different.
Here is s thread with more detail.
I'm scratch building the FT Cruiser and would appreciate all the help that anyone can provide in designing the power system from the ground up. I know that I can use the parts specified by Flite Test but I really want to learn the fundamentals for future builds. I'm not into 3D flying yet so I...
forum.flitetest.com