I've used both, and the Roto-Zip gets the vote for one winning Vanagon
specific task, namely cutting the hole in the pop-top for a skylight (my 82
didn't have one). Worked very well for that.

The Roto-Zip was the neighbour's, he bought it to see if it would help in
the renovation of the old farmhouse he lives in. It did, did a good job of
cutting  plaster and lath etc.

But the Dremel might win overall as its more nimble and can be used for a
myriad of small grinding/cutting/polishing tasks. But really, spending some
money on decent files and hacksaw blades would be more cost effective for
95% of the time.

Alistair

--
'82 Westy -> diesel converted to gas in '94
albell@uvic.ca
http://members.shaw.ca/albell