I know there are differences, different cover, different core, but can anyone who has thrown the two tell me any major motion differences, strength, etc...
I have an option to get an Alpha Crux used for around $100 redrilled for my hand, and I want to know If the differences are enough to pass it over.

All things equal (surface/layout/etc.), the Alpha is the smoother of the 2 and overall will hook slightly less than Sure Lock.

Might be worth snapping that Alpha up though as Storm won't be using that core again more than likely and people really love that ball.

U don't even see the pros using the sure lock if that says anything. I keep seeing alphas...

Pros are using the Sure Lock.  Liz Johnson and Richie Teece won WSOB titles this year with Sure Locks.  Marshall Kent used one in qualifying during the WSOB:

https://www.facebook.com/StormisBowling/videos/1627744117285485/?comment_id=1627771617282735&comment_tracking={%22tn%22%3A%22R0%22}