nordicas mostly use the same shell... as in, the nordica beast is the same boot as the supercharger, but without the shock "eraser"
the supercharger's have different models for different flex.
supercharger spark has a 70-80 flex (i have them, love them, best boot ive ever owned.)
supercharger ignition has a 90-100 flex im pretty sure (brother has them, loves them, his favorite boot since the shell of his beast's cracked somehow. warranty gave him the newer boot that had the same shell as the beast)
- aspirin is perfectly legal, but if you take 13 of them motherfuckers it'll be your last headache.
The sparks and Ignitions are both great boots. They have a very standard width that most ppl like. Unless you have narrow feet, or huge wide mofos, you will probably like this boot. They have very plush liners, that are known to pack out quite a bit, so keep that in mind.
thanks everyone. +k. i way 140 should i get the spark or the ignition? i ride everywhere lots of BC and a trip to the park everyonce and a while. im looking to get better on rails this year so 50% park 50% BC