So would you say the same or less vibration than when the originals were intact and working properly? When the day comes that mine needs new ones, I've been of mind to keep the originals but not if there's no downside to these solid rubber mounts.
I bought my Tahoe 47,000 miles ago with around 146,000 on the clock. I don't know when I officially "tested" the mounts, but it wasn't long after I bought it and they were shot then. The port side was blown because I noticed the dried rust-colored trails originating from the mount while underneath for it's first oil change under my ownership. The starboard side leaked soon after because the rust-colored fluid was fresh and wet. So, I can't say how the original mounts feel in comparison. My Tahoe sometimes idles so smoothly that I can barely tell it's running and other times it has what feels like a very slight random misfire. I haven't been able to relate the varying idle characteristics to any particular type of driving, atmospheric conditions, fuel brand and grade, etc. I'm not so concerned with it as, apparently, it's completely normal for these things. I'd say that, with the H3 mounts, it seems to have the "smooth idle" spells more often. By the way, when I mention the idle vibes, I don't mean anywhere near how poly engine mounts feel. The vibes I'm referencing are strictly those infrequent "pulses" that feel like a slight random misfire, like once or twice within a 5-10 second period.
I honestly see NO downside to the H3 mounts. The hydraulic mount is a weak design and I really think was only conjured up to help absorb the extra vibrations that occur when AFM is active. My AFM has been disabled for about a year now so I surely don't need the special (and weak) mounts. Even if my AFM was still active and even if the H3 mounts transmitted noticeably more vibrations, it couldn't be much and surely not enough to warrant electing to repeatedly replace the hydraulic mounts after every time the truck towed or was driven more spiritedly (such as when your wife drives).
It's definitely a job I'd only wanna do once if I could help it. I'd rather have the small chance of feeling a shake ever so often than the guaranteed chance of having to repeat their replacement.