Seems twice a year this question comes up about the mojos, so here's a difference in the three:
Triumph - Made in Mexico, Paint job, Black Guide Frames, Full Cork, ECS or TCS Reel Seats
Mojo - Made in Mexico, Paint job, Black Chrome Guide Frames, Split Grip Only, ECS Reel Seats
Premier - Made in USA, Paint job, Black Chrome Guide Frames, Full Cork and Several Split Models, ECS or TCS Reel Seats
They all have:
SCII Graphite
Baston Forcast Hard Aluminum Oxide Guides
Spinning Models have DPS Seats