lot rhythmic , lot changes , lot progressions....
tech metal music is the answer...but not all tech metal music is similar......
where find similar / closer music style ?

INTRUDER - Psycho Savant?

I was referred to an album by some members a month or two ago for an album very similar to Spreading the Disease. And both albums were a little more thrash, so I think you may like them:

Intruder - Live To Die



Acid Reign - The Fear

Heathen should work for you if you aren't already familiar with them. Go for the debut if you want it more melodic or the sophomore if you want it more technical and progressive.

Cyclone - Inferior to None

Very rhythmic , Bay-area styled thrash from Belgium that riffs for days.

This really belongs in the Thrash Recommendation thread.

I'd also recommend:
MORTAL SIN - Face of Despair
NUCLEAR ASSAULT - Handle with Care
EXODUS - Fabulous Disaster
M.O.D. - Gross Misconduct
HADES - If at First you don't Succeed
PRONG - Beg to Differ
PANIC - Epidemic
SACRED REICH - The American Way
LICH KING - World Gone Dead
WHIPLASH - Insult to Injury
CYCLONE TEMPLE - I Hate therefore I am
MORDRED - Fool's Game