One huge difference is that Maggies are still made, and supported by the company. They'll refurbish almost all of their speakers, even custom-build drivers for discontinued models if you need one, as I discovered when Fedex did a job on my Tympanis. You can replace a treble ribbon for a fraction of the cost of a Graz ribbon -- not criticizing Graz here, but he's a relatively small volume operation. If your bass drivers are delaminating and you have a weekend, you can fix them yourself with Magnepan's kit for $40, where a new Apogee bass driver would cost you thousands. It all makes Maggies a much more practical option.
I do wish I could get my hands on a couple of Apogee midrange ribbon drivers, though, and put them in my Tympanis. :-) This is one of the few areas I think in which an Apogee will beat a Tympani, but it's a crucial one, since the midrange is the soul of the music. There are some DIY midrange ribbon projects on DIY audio, but it looks like they'd take a summer.
I think it's also true that there are a lot more Maggies out there, and both the new and used prices offer inimitable bang for the buck. Apogees were more expensive to make and repair, which is apparently the main reason the company went out of business.
I do wish I could get my hands on a couple of Apogee midrange ribbon drivers, though, and put them in my Tympanis. :-) This is one of the few areas I think in which an Apogee will beat a Tympani, but it's a crucial one, since the midrange is the soul of the music. There are some DIY midrange ribbon projects on DIY audio, but it looks like they'd take a summer.
I think it's also true that there are a lot more Maggies out there, and both the new and used prices offer inimitable bang for the buck. Apogees were more expensive to make and repair, which is apparently the main reason the company went out of business.