For sure!
The major difference in the mechanic is that
Chi Master as written in
Weird Westplays like a magic user that just uses martial arts as its trapping. It's perfectly serviceable, and honestly if that is what you'd prefer we can go with it. They are essentially wizards, warlocks, spellcasters (take your pick) that need to (1) be good at fighting and (2) be have good spirit in order to "cast their spells."
To give a Monk vibe in Savage Pathfinder, Pinnacle added some "quasi" arcane backgrounds, like Mystic Powers. Mystic Powers edge leans into the monk vibe you'd find in other mechanics. It's
not a spell caster. It's a character that can essentially power their attacks or buff themselves user their inner power. Meaning, you don't roll to cast. You just spend Power Points to add the power to your attack.
This means the chi master would no longer need to be proficient in both Spirit
and fighting. Just fighting. The trade off is that Mystic Power flavored Chi Master is limited in the new Edges they can take--as listed. And they have fewer starting Power Points--10 as opposed to 15.
Play Example:
Chi Master (as written in Weird West.
Chuck is going to use Lower Trait on the Gunslinger Bandit. He runs up and makes a Touch Attack (Fighting +2, -2 from Multi-Action). He gets an 8 vs the Gunslinger parry of 5: SUCCESS!
Now Chuck need to roll Spirit to cast Lower Trait, as a
multi-action! He rolls his spirit (-2) and gets 3. Chuck has failed to use Lower Trait on the Gunslinger.
Chi Master using Mystic Powers.
Bruce is fighting with a Rail Warrior. He wants to cast Lower Trait to lower his enemies shooting attack. Bruce charges in and attacks the Rail Warrior--rolls Fighting as a Touch Attack (+2). He gets a 7 which hits the Rail Warriors Parry of 5. Bruce spends 4 Power points (+2 from the power's cost and +2 to make it a raise). Thus the rail warriors Shooting die is now a d4.