Even if my program works slower and it is more difficult to use (of course not for me), I'm proud of it. cheesy . But there are some things where my program is better
1) it's open source,
2) multiplatform: Linux, Windows, OSX (Mac) (should also work on ARM CPUs)
3) 64-bit version (now for all systems) - almost unlimited image resolution
4) volumetric light effect
not only,Buddhi , it has also a good guide that is very important for novices (as me..) that is totally missed for mandlelburb 3D (luckily there are some good tut on deviantart, but still your guide is far more complete , especially regarding animation
nevertheless i would not say that one is better then the other
But well i believe for somebody new to 3d fractal will be no doubts, in that case a good starting guide is the winning point ,and in this case on this point would be no match.
And here i want add my compliment, is rare for Open Source software, especially in case of one-man project to offer a decent documentation