The handle on the 3 IS smaller but it's not a bad fit for my hand.
For the tasks I intend to use it for I think it'll be great.
The handle on the MP is a lot larger and more comfortable. Res C is hands down the absolute best handle material!!!! Bar NONE!!!!
I'm happy with BOTH knives but want to give the 3 a chance. I plan to make it a work knife which is somewhere my MP WON'T go!!! I only have a leather sheath for the MP and it's way to nice to ruin or even chance ruining.