It's just the models I've got mixed up. Yours and the show one look the same, it's just the glass case model that has the FTL strip looking really weird. It may just be because it's unlit, but it looks drastically different to the show and your build. Might well be the exhaust effect as you said. So it's a toss up between modelling to look like the Malozzi or modelling to emulate the look that the lighting/exhaust gives.
Well, the good news is, sciroccojunky has given his blessing to share the destiny gate files with you and to split the cost so you only pay half each. Just waiting to find out size and which dialling method he wants for that gate. Will also try and figure out a way to have the event horizon as a removable piece so that the stargate can be displayed the way you choose at that particular time. Owing to the shape and rough size of the gates, I can get away with modelling at the minimum printable thickness which will make it easily lightable. The destiny herself will be slightly thicker to aid with the shear size and to keep it strong through the molding process.