Huh, I suppose its a matter of personal preference. I've owned a fullsize Rittergrip Mk1 since they first came out. Anybody else remember when they came first came out with an optional Bianchi sheath?? Now I own four of them - the original S30V, the M2 version, the M4 version, and most recently an orange-handled S30V. I've got to admit the tool steel versions are "closet queens". I've EDC'd the mini Rittergrip since soon after the Mk1s first came out. While I hear the difference when I "plink" the handle with my finger, in used the fullsize handle feels MUCH more comfortable and, well, "full" in the hand ... and plinking isn't something that happens in use - ever. In all that time I've never perceived the handle to be cheap or weak or likely to break - never even thought about it. The thing is tough as nails. I've just viewed the difference in construction as a way to cut unnecessary weight - which is important to me since it rides in my pocket when outdoors (in the field camping, hiking, ...).
I EDC the mini because it is just more comfortable in my pocket while running around and at work, but in actual use, I like the fullsize much better.