These guys are cheaper than tower.
http://www.hobbypeople.net/index.ph...://www.hobbypeople.net/index.php/magnum-sale/
A .91 for 160 bucks is pretty damn good. Tower has it for 170.
I don't know about them being the same, but I'm getting rid of an ASP 2 stroke which liked to quit mid air resulting in a two piece fuselage. I won't trust it again. I haven't been able to find anyone who will stand up for ASP engines, but I know lots of people who swear by the Magnum 4 strokes. In a foamie I'll take chances but with a plane like this, I'll pay a little more for a name I can feel confident about.
Here's the ASP .91 for 130.
http://www.hobbyking.com/hobbyking/store/__8984__ASP_FS91AR_Four_Stroke_Glow_Engine.html
Looks the same, but so do a DA and DLE and they are not.
So an ASP for 130 or a Magnum for 160. That's 30 bucks that you'll probably make up for in shipping and you'll get the Magnum a lot sooner. I'll pay the extra bit for the peace of mind when I send up a model I've spent so much time rebuilding.
Now don't get me wrong I like electric power for a lot of things but there's no way an electric is as cool as a nitro or gas. I own both and I prefer the instant performance and no tuning of the electric for high performance models, but you can't deny the cool of firing up a gasser. They are much more fun in my opinion and I own both.
That said, I don't like the sound of 2 stroke nitro's. I find them irritating but still more cool than electric. I like the gas motors or four stroke nitros. They sound real and perform the way I like.
Here's my fleet.