Hi,

I own one of each and fly them both.
I first got the Sceadu, then the Raptor. They both have the OS 50 SX-H Hyper and Hatori muffler.
The Sceadu is technically much more advanced than the Raptor. It has much more parts as well.
You can also look at it from another side and say the Raptor is more simple and staight forward.

I would recommend to get a Raptor first because of its simplicity and low-cost parts (you will need some!).
A Raptor can wear out quickly if you fly much, so eventually you will need another one.
At that time, get the Sceadu.