Basically you can spec a coast up with
almost everything an ocean has, such that they are essentially the same vehicle. You can have a coast with an electric roof, alloy wheels, led lights, fulll interior lights, shower thing, the top stereo, climatronic, AAC, any engine, leather, double glazing, electric wing mirrors, reversing lights and beepers, fog lights, interior heater, three window bellows etc. etc. ALL functional options are available. (well, they were for the T6, and it looks the same for the T6.1 on the german configorator.), but none of them come as standard.
The only things not available are a handful of cosmetic things: colour coordinated wing mirrors and door handles and two fewer chrome strips on the front, and the interior fabrics and paint colors available for the coast are different and while you have some options, you cannot spec the ocean ones.
I think probably if you are going to order pretty much everything anyway, the Ocean will end up slightly cheaper, if you want to build-your-own, then the coast can work.
I wrote down everything i wanted, and then sat with the chap at VW and configured both an Ocean to have it all (needed about ten 'extras') then a Coast to have it all (needed about 20 'extras') and the Coast was €3k cheaper, so i got that. (and i honestly prefer the manual roof (which goes 'up' automatically in any case - you unclip it and push a bit and it does the rest) and i think the black wing mirrors and door handles look good on a red van!
)
I'm super happy with mine, although god knows what i was thinking not get parking cameras. haha.
(i also suffer from massive 4motion envy, but i really need five seats, as i have three daughters and i'm still holding out some hope that i might find someone to hang out with us at some point.
)