that’s sort of a tough question to answer.
i can draw many things in sketchup a lot faster than in rhino… but that’s with simple things like an average house for example. once you start leaving the straight line/square volume realm though, things can become much faster (and obviously or maybe not so obviously) and much more accurate in rhino.
so that’s pretty much my tradeoff right now between sketchup and rhino… a lot of my setup geometry is faster for me to do in sketchup but then the more complex bits become easier/faster in rhino… (i.e.- rhino has actual commands for things such as creating/blending surfaces which pay attention to the adjacent surfaces for tangency etc… sketchup has no such thing and is unaware of adjacent surfaces… the only way to create tangent surfaces is to manually create either a lot of setup geometry or draw the actual wireframe itself… it can be a very long and drawn out process to get it ok for construction (for archviz though, it’s fine and you can quickly fake a lot of stuff in sketchup)… where as with rhino, you can do these things in a matter of clicks and then as a bonus, there simple means to check the blends (which provides more confidence during the build)…
i’d also consider myself an advanced sketchup user and maybe just moving into intermediate rhino territory… so in that regard, i’m obviously going to be faster a sketchup but if i were equal at both, i still think sketchup would be faster in some ways… this is due to it’s simple toolset… there’s one way to draw an arc… one way to draw a line… one way to extrude a surface etc…the keyboard shortcuts are usually all single keys with no modifiers…
with rhino, even the simple drawing tools have many options… which is good and bad… if i want to draw a simple straight line in sketchup, it’s faster because i don’t have to deal with command options… there are none… but, if i want to do something crazy like draw a line from a centerpoint, this becomes a lot easier/faster in rhino.
so after using cad in my work for over 10 years now, my designs have become more complex to the point where using rhino is cumulatively becoming much faster than sketchup… (not to mention the fact that some of the tools in rhino are actually driving some of the design… as in, there are things in rhino which are simply impossible in sketchup)
anyway-- that’s not really even answering the question… it’s just meant to point out that while there are some things on the surface as to where rhino could see some improvements compared to sketchup regarding user tool speed, it’s hard to think of ways to speed up rhino without losing it’s advantages
i guess what i’ll call the main advantage of sketchup which i’d like to see more of in rhino is the ability to stay in the 3D viewport more often… a quickie example (and i have lots more of these 
) would be using the arc:center/start/angle… if i have a vertical square, i should be able to use that tool to draw a vertical arc in there but it’s confined to the cplane so it wont do it… i basically have to go to another viewport or figure out a way to use another arc tool in this situation when it seems the main arc tool should do it.
one other beef i have with drawing in 3D is it’s often times an unnecessary amount of work to go vertical… i wish there was a key i could press (and maybe there is?) which tells, say a polyline, to go vertical… the whole cmmd-clicking again at the exact point etc in order to elevator just doesn’t flow so well…
but yeah, it’s all really small things like that which sketchup has (i.e.- in sketchup, if you want to draw a vertical line, you just move the cursor up (as in, it sort of can tell what the user is seeing/thinking in terms of what up means as opposed to relying strictly on where the cursor is in relation to the cplane.))… but a bunch of tiny things can add up into what equates to better flow throughout a session… but at this point, for me at least, the really big differences far outweigh this tiny stuff…
