The smaller one is as cheap if not cheaper than the larger bushes on the other end and I didn't find it transmit much more vibration into the cabin compared to having just the large bushes fitted (I fitted both powerflex bushes on the subframe end of the dog bone mount and fitted the smaller super pro one on a later date). So the way I see it is if vibration is something that anyone is concerned about then it is a good idea to do the smaller one, especially if you are only going to change one of the two bushes on the subframe end, I like to think this would be a nice compromise.
In terms of how well the smaller bush performs I would say it is definitely noticeable, although less of a difference when compared with the bushes on the subframe end. I am not sure I would recommend anyone replaces all the bushes especially if they do alot of city driving. After changing all the bushes I now get alot of vibration in the cabin and steering wheel which gets worse when you revv the engine when sitting idle. My golf is pretty much a track car so it doesn't bother me much but on the odd occassion I have had to drive into the city I have felt my patience running out.
I will be sure to get a video of just how much vibration one can expect from using the same bush setup as mine (both parts of the powerflex bushes on the subframe end and super pro on the gearbox end) so that everyone can make a more informed choice when deciding what to buy.
