Im not convinced there is a standard way to compare 2 bars just by rise alone. Plenty of companies seem to have the bar rolled forward of back compared to eachother based on the angle markings on the bar, so rise is never what they say by the time you have adjusted to suit your preference for rearward and upward sweep.
I have 2 sets of vibrocore bars, 50mm rise (which looks huge) and 15mm (which is does not look like a lot unsurprisingly). While I dislike the feel of bars that are too high, too low is worse IMO. Vibrocore is great though, very interested in seeing reviews of the vibrocore rims they are bringing out.