I've also received a response to my email to Ikelite, confirming the color temp which is more like that of the previous DS51. They were considering a reflector that would warm/widen the beam a bit but decided to go with the brighter but cooler beam instead. The diffuser warms it just a little bit and they're considering warmer diffusers as well for wider angle use. Of course with the narrower beam this still isn't near the total light output of a DS161/160, but it is pretty bloody good within the beamwidth for its size.
All in all a very nice informative reply from Ikelite. Should let them gain some of the strobe market share for those who use non-Ike housings at the size and price/performance ratio, with the full TTL and pre-flash mimicry [maybe I mean some 'more' of the share: I know there are some users of Ike strobes with the non-ike housings now, but these will no longer require any sort of TTL adaptor or slave sensor].
Now if someone would just make a true 'microflash' unit that does TTL-speed and preflash sequencing when mounted on the hotshoe, but is in a tiny formfactor to fit inside the Ike molding bump which doesn't allow true DSLR flash popup, we'd have an awesomely simple system that just coupled right through the housing wall with no more TTL-electronics built 'into' the housing and making upgrades a tad less expensive as a result. Buy the microflash once for your chosen system and the Ike housing becomes purely the mechanical shell. (My own simple LED-flash unit permits manual operation only since it just triggers off the sync pulse....so in the long run I did find myself going back to the cabled connection to have the TTL available, even if I didn't always use it. Hey, I am just a 'vacation' dive shooter, not a pro... cut me some slack.)