I have both. Between the two, the Hioki is the more “pocketable” one (with its much smaller size, permanently attached leads and slim hard plastic carrying case).
As you know, unlike Fluke, it cannot measure capacitance and voltage drops across diodes (not directly, of course - you can still check diodes by measuring the resistance in both directions). It also beeps a lot (at power on and every time it changes ranges in autorange)…
Fluke 101 seems better built, it uses regular sized leads and feels more like a regular meter. Probably more robust, too.
Both nice, overall. If you have specific questions, I might be able to answer.