Sloppy, in my limmited dg career I went from Aviar to Wizard to Ridge to Pure. Granted my skill has changed significantly along the way, i still have all these putters and I continue to out-perform the others with the Pure.
Pures are very close to DX Aviars, but aren't as tall of a profile. I don't care for beefy/thick putters and the Zero Line plastic trumps DX/Pro.
Pure v. Spike.... i got 2 of each about a year ago when i wanted to try something other than wizards. The Pure is clearly taller than the spike, but the spike felt tooo thin, like putting with a core. Driving the spike was faster, but way less stable and would be hard to be accurate with it, Where as the pures could be released with a little bit of hyzer, flip flat, and glide like a Fuse. It is the easiest straight-driving putter i have thrown and has noticeably improved my approach game. Hang a bit of anhyzer for a dog leg and it'll do the trick just nicely. I also carry a fuse, but it doesn't get used much below 200ft. Yes, there is overlap, but the fuse has more distance than the Pure. Where the spike with the slim profile has the potential to bridge the distance gap between pures and fuses.
hope that helps