I have a DMC I trained MC on (after few games playing as MC) he performs equally well in both. Once he played AMC and scored but that was a one-off.

I've had 2 ex-Scout market triple role left wingers with SS SA who were great goalscorers, just not much good as DML.

Never had a wide player with 3 vertical roles that could play all 3 but no doubt they exist, somewhere, I just don't have the need anyway and my sp distribution probably wouldn't help up to 7*.
Alt teams have triple horizontal role AMs that perform well.

I always say if the roles are compatible they're more likely to work similarly.