I would guess pretty much the same. You can not compare these kayaks to really fast ones. Fast meaning fast at the wave making speeds of past 8 km/h (5 mph). And then you can not compare Rijper to K1 sprint kayak past 10 km/h (6.2 mph).

It all depends what the fast is for each person. But if Ken really wants kayak that has noticeable speed difference I think he should go for clearly faster one.

Toni.

: In my opinion I don't think you would see alot of difference with respect to
: speed between the Silver and either the OI or the Night Heron. I have
: built 7 kayaks now and can't say I see much difference in speed between
: any of them with the exception of the Derijp and an SOF which are much
: narrower. maybe if I had special equipment checking me I could tell but
: your only talking @ an inch narrower and maybe a foot longer between them
: and the Silver. I can tell you that the OI is a very strong tracking boat
: and for me is one of my favorites. A good all around boat I'm 5-8 and
: currently 165lbs. The Derijp has become my favorite but at 18' 9'' and a
: 16-3/4" beam with only 7" deck to hull at the coaming most
: paddlers don't fit. It's the fastest boat I have paddled. It's not a
: strong tracker due to more rocker but very managable. My suggestion would
: be to paddle them if you can find them locally. Another option is to build
: an SOF custom built to a size you want and if you like the outcome build
: it strip built. That's what I did for the Derijp. It's a 1600's vintage
: West Greenland hunting Kayak surveyed by Harvey Golden. I paddled several
: replicas of the SOF that others had built. I liked it, lofted it and built
: it.

: Kent