The Spk Pro from last season and SPK 100 from thisseason are pretty much the same, other then the flex. I had teh Pros at the start of last season then switched to the 100's in Febuary.
Overall there are vertially the same other then the softer flex and stronger buckles on the new ones.
I actually prefer the Pro's though as they are stiffer, I found teh 100 soft untill I got a Foam injection liner for them.
verall if the 100 fits you well then the pro's from last season will be fine too.
Make sure you get a custom footbed for them though makes a huge differnce.