Difference between Questionable and Problematical

QUESTIONABLE vs PROBLEMATICAL: ADJECTIVE

Subject to question
Open to doubt or challenge; problematic.
Not yet determined or specified.
Of dubious morality or respectability.
Admitting of being questioned; inviting, or seeming to invite, inquiry.
Liable to question; subject to be doubted or called in question; problematical; doubtful; suspicious.
Problematic; open to doubt or challenge
Of dubious respectability or morality
Able to be refuted

Capable of being questioned or inquired of; inviting or seeming to invite inquiry or conversation.
Liable to question; suspicious; doubtful; uncertain; disputable: as, the deed is of questionable authority; his veracity is questionable.

Supposed, Apocryphal, Deniable, Suspect, Refutable, Alleged, Equivocal, Suspicious, Fishy, Problematical, Shady, Problematic, Debatable, Doubtful, Dubious

Troubled, Issue, Delicate, Disruptive, Challenging, Troubling, Troublesome, Tricky, Hard, Knotty, Questionable, Baffling, Debatable, Difficult, Problematic

Supposed, Apocryphal, Deniable, Suspect, Refutable, Alleged, Equivocal, Suspicious, Fishy, Problematical, Shady, Problematic, Debatable, Doubtful, Dubious

Troubled, Issue, Delicate, Disruptive, Challenging, Troubling, Troublesome, Tricky, Hard, Knotty, Questionable, Baffling, Debatable, Difficult, Problematic

Histopathology should be considered to discern questionable lesions.
Implement procedures for follow up on questionable cases.
Any questionable purchases are reimbursed by the employees.
The value of determining rectal temperature is questionable.
Report: Steph Curry, Kevin Durant questionable tomorrow vs.
Might some of those restrictions be constitutionally questionable?
The evidence behind this dietary strategy is questionable.
Propose removing this verbiage as it is questionable whether this is relevant given the amount of information available and possibly ethically questionable.
Do report coupons you see that look questionable by sending any valuable information you have about where you saw or received a questionable coupon.
We have software on all our electronics that alerts each other if we go to questionable sites or search questionable content, etc.

The management of budget resources is less problematical, if often unrealistic.
Dante was perhaps marginally less problematical than it is for us.
Some of these films can be problematical re gas exchange.
The contemporaneous perception test has been problematical in its application.
Progress measurement helps you to recognize problematical areas and bottlenecks.
I am vilifier some problematical intense from tropism tonight.
Both alternatives are usually problematical: hence the dilemma.
Existing research on formal discussion procedures appears problematical.
The international repercussions proved a little more problematical.
In a large firm this can be problematical.